which occurs in meiosis but not in mitosis? a. cytokinesis b. dna replication c. crossing over d. chromosome condensation
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Crossing over is the exchange of genetic material between homologous chromosomes during the first division of meiosis occurs in meiosis but not in mitosis. Option C is the right answer.
This process leads to the formation of recombinant chromosomes that contain a mix of genetic information from the maternal and paternal chromosomes.
In mitosis, the chromosomes replicate but do not undergo crossing over, as there are no homologous chromosomes to pair with. Mitosis is a process of cell division that produces two genetically identical daughter cells, whereas meiosis produces four genetically diverse daughter cells.
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Related Questions
Fossils are preserved remains of previously living organisms or the traces dating from the distant past fossils that have been collected offer unique insight into evolution offer a long time scale however fossils have some limitations select all the limitations of using fossils as evolution evidence
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Answer: There are 3 answers.
1- Plate tectonics causes loss or displacement of fossils.
2- Most organisms never fossilize, leaving holes in the fossil record
3- Because marine fossils are prevalent, this can lead people to believe they were more dominant than they actually were.
Explanation: I have an explanation but i’m not in the mood to type it in. trust me it’s correct
human chorionic gonadotropin (hCG)
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called
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The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called human chorionic gonadotropin (hCG).
Human chorionic gonadotropin (hCG) is a hormone that is produced by cells around the embryo, that is, trophoblastic cells that develop into the placenta, after fertilization. Its main function is to maintain the corpus luteum during the early stages of pregnancy. The corpus luteum is a temporary endocrine structure that develops after the release of an egg from the ovary, that is, after ovulation. It produces progesterone, which is essential for the maintenance of pregnancy in humans.
If an egg is fertilized by a sperm, the resulting embryo secretes hCG, which signals the corpus luteum to continue producing progesterone. This is necessary to prevent the lining of the uterus from shedding and to maintain the pregnancy. If the corpus luteum did not receive this signal, it would degenerate after about 12 days, and progesterone levels would decline. This would cause the lining of the uterus to be shed and menstruation to occur. The levels of hCG in a woman's blood and urine can be used to diagnose pregnancy. hCG levels rise rapidly in the first few weeks of pregnancy and can be detected by a blood or urine test. After about 10 weeks of pregnancy, hCG levels start to decline and eventually level off.
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Why are coral reefs important?
A: Coral reefs house over 25% of marine species.
B: Coral reefs provide an important habitat for many ocean creatures.
C: Coral reefs create important food webs.
D: All of the above
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Why do you think the narrator used the term “successful mistakes” for his chromosomes?
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the group that probably gices rise to chloroplasts is the
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A cyanobacterial endosymbiont gave rise to chloroplasts, which replicate its free-living ancestor's ability to divide and multiply.
Organisms that symbiotically coexist with another cell or creature are known as endosymbionts. Others adhere to the surface of cells, while others are located inside cells (intracellular) (extracellular). Relationships that are symbiotic are those in which both parties gain. Endosymbiosis is a type of symbiosis in which the symbiont resides inside the body of its host; this symbiont is referred to as an endosymbiont in this situation. Rhizobium's partnership with plant legumes is an illustration of an endosymbiosis. The endosymbiont found in the roots of legumes is rhizobium. Essential eukaryotic organelles of endosymbiotic origin are mitochondria and chloroplasts. These organelles are divided by dynamic cell processes. Because it provides an explanation for how chloroplasts evolved, endosymbiosis is significant .Others adhere to the surface of cells, while others are located inside cells (intracellular) (extracellular).
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How does the stacking of thylakoids and folding of cristae in chloroplasts and mitochondria reflect their function?
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The stacking of thylakoids and folding of cristae in chloroplasts and mitochondria are meant to increase the surface area. This gives more space to perform their specific functions.
Chloroplasts are the chloroplast pigment containing organs present specifically in the plant cells. The function of chloroplast is to perform the photosynthesis. The stacks of thylakoids are meant to increase the surface area and hence provide more space for the chlorophyll to absorb sunlight energy.
Mitochondria is the power house of the cell. It is a double membranous structure with the inner membrane folded into small finger-like projections called cristae. These cristae increase the surface area and hence various ETCs can be carried out simultaneously to increase the ATP production.
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in the water cycle water returns to earth as CONDENSATION usually in the form of rain or Snow true or false
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This the answer y’all are welcome
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The results would have been that the glucose would be found because it would reach an equilibrium.
Initially, glucose was found only inside the dialysis tubing.
After 15 minutes, a sample was taken. That sample showed that glucose was found outside the dialysis tubing.
How do we explain?The dialysis tubing which is known as Visking tubing, is described as an artificial semi-permeable membrane tubing used in separation techniques, that facilitates the flow of tiny molecules in solution based on differential diffusion.
Only low-molecular-weight molecules, such as sodium, potassium, urea, and creatinine, are permitted to flow through the dialysis membranes; proteins, such as albumin, and other bigger molecules are blocked.
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What is the diffrence between a cold and a warm front
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A cold weather front is defined as the changeover region where a cold air mass is replacing a warmer air mass. Cold weather fronts usually move from northwest to southeast. Warm fronts usually move from southwest to northeast and the air behind a warm front is warmer and moister than the air ahead of it.
Explanation:
Remember, prophase, metaphase, anaphase, and telophase represent the stages of Mitosis - not
Interphase. Which stage of mitosis takes the least amount of time?
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Answer:
Why is anaphase the shortest stage? The kinetochore microtubules shorten as the chromatids are pulled toward opposite poles, while the polar microtubules subsequently elongate to assist in the separation. Anaphase typically is a rapid process that lasts only a few minutes, making it the shortest stage in mitosis.
Which three statements correctly describe the roles of rna molecules in the process of transcription and translation in animal cells?.
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Transcription is the process where mRNA molecule is synthesized from a DNA template whereas translation is the process where an amino acid sequence is synthesized from mRNA.
What describes the role of RNA molecules in transcriptions and translation?Three statements that correctly describe the roles of RNA molecules in the process of transcription and translation in animal cells are:
mRNA molecules carry genetic information from gene in the nucleus to the ribosome in cytoplasm.
tRNA molecules carry appropriate amino acid to growing polypeptide.
Ribosomal RNA molecules functions in the assembly of the ribosome-mRNA complex and also in the formation of peptide bonds between the amino acids in the growing polypeptide.
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How much is DNA important to identify a group? Give a brief explanation on race ,whiteness and property? Does biological anthropologists and genome scientist need to add the relation between Europeans and Indigenous people while doing their research?
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DNA is important in identifying genetic relationships within a group, but it alone is not sufficient to determine complex social constructs like race, whiteness, or property; the inclusion of social, cultural, and historical factors is crucial in understanding these concepts.
Biological anthropologists and genome scientists should consider the relationship between Europeans and Indigenous people in their research to provide a more comprehensive understanding of human genetic diversity and population history.
DNA analysis can provide valuable insights into genetic relationships within a group, such as determining genetic ancestry or identifying related individuals. However, race, whiteness, and property are social constructs that go beyond genetic factors and are shaped by historical, cultural, and socioeconomic factors. These concepts are complex and cannot be solely explained by genetic data. Therefore, it is important for researchers, including biological anthropologists and genome scientists, to recognize the limitations of genetic data and consider the broader social context when studying race, whiteness, and property.
In the context of researching Europeans and Indigenous people, it is crucial for researchers to acknowledge and incorporate the historical and ongoing relationships between these groups. This includes understanding colonization, displacement, and the impact of power dynamics on genetic diversity and health outcomes. By including this relationship in their research, scientists can contribute to a more accurate and nuanced understanding of human genetics and promote social and scientific equity.
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Wastes and now the remains largely of dead organic matter would accumulate, and the nutrients in the waste and dead organisms would not be released back into the environment. The producers would not have had enough nutrients.
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Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments.
What is Organic matter?It is matter composed of organic compounds that have come from the feces and remains of organisms such as plants and animals. Organic molecules can also be made by chemical reactions that do not involve life.
Basic structures are created from cellulose, tannin, cutin, and lignin, along with other various proteins, lipids, and carbohydrates. Organic matter is very important in the movement of nutrients in the environment and plays a role in water retention on the surface of the planet.
Organic chemicals make up all living things. When organisms are alive, they emit or excrete organic material into the environment, lose body parts like leaves and roots, and their corpses are decomposed by bacterial and fungi after they die.
Therefore, Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments.
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kendra's marginal benefit from consuming the first ice cream cone is
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Kendra's marginal benefit from consuming the first ice cream cone is the satisfaction and joy she experiences from consuming it.
Eating the cone provides Kendra with an immediate reward, as the cold, sweet, and creamy treat brings her pleasure. Additionally, Kendra's first cone may also be a form of self-care, providing her with a much-needed break and a short respite from her daily life.
The experience of eating the cone itself is also a source of pleasure for Kendra, as the combination of flavors and textures provides her with a momentary sense of satisfaction. As Kendra continues to consume more ice cream cones, her marginal benefit from the first cone will eventually diminish due to the law of diminishing marginal utility.
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What is the term for the site where the muscle attaches that does not move when the muscle contracts?.
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The origin is the term for the site where the muscle attaches that does not move when the muscle contracts.
It's simple to believe that muscle is muscle, and that the tissues in hearts, tongues, and arms are essentially the same. Mammalian bodies, however, are composed of three distinct muscle types: cardiac, skeletal, and smooth. Organs including our skin, blood arteries, and digestive tracts are made up of smooth muscles. The heart's muscles are called cardiac muscles. Despite how amazing and sophisticated these tissues are, the skeletal muscles are what carry out the bulk of the work.
The muscles that are a part of the skeletal system are known as skeletal muscles. They are voluntary muscles, as opposed to the hearts and stomachs, and one has cognitive control over them.
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wheezing and shortness of breath are symptoms of what?
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Answer:
Asthma and chronic obstructive pulmonary disease (COPD)
Explanation:
Inflammation and narrowing of the airway in any location, from your throat out into your lungs, can result in wheezing. Both diseases cause narrowing and spasms (bronchospasms) in the small airways of your lungs.
which antibody confers the most important specific local immunity to enteric, respiratory, and genitourinary pathogens?
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IgA (Immunoglobulin A) is the antibody that confers the most important specific local immunity to enteric, respiratory, and genitourinary pathogens.
What is antibody?An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Antibodies recognize and latch onto antigens in order to remove them from the body. They are found in the blood and other bodily fluids and are an important part of the body's defense against infection and disease.
IgA is produced mainly in mucosal areas such as the gastrointestinal tract, respiratory tract, and genitourinary tract, and is the primary antibody found in mucosal secretions. It plays an important role in protecting the body from infections by providing a first line of defense. IgA can bind to and neutralize pathogens such as bacteria and viruses, helping to prevent them from entering the body.
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what primate has a y-5 molar, is large and hangs from trees, has a sacrum but no tail
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The primate that has a Y-5 molar, is large and hangs from trees, has a sacrum but no tail is Gorilla.
What is a gorilla?Gorilla is a genus of ground-dwelling herbivorous apes that inhabit the forests of central Africa. Gorillas are the largest primates and are divided into two species: the eastern gorilla and the western gorilla. Gorillas, like humans, have opposable thumbs, but they are considerably larger and stronger than humans. They can easily crush a human skull with their bare hands if they wish.
How to identify a Gorilla?The following are some of the distinguishing characteristics of gorillas:
They have broad chests and shoulders, with males weighing up to 400 pounds.
They are tailless primates that walk on their knuckles, which is known as knuckle-walking.
Their ears are small, and their nostrils are broad and flat, similar to humans.
Their skin and hair are black, and males have a silvery-white patch on their back after they reach maturity.
Their molars, as the question implies, are Y-5, which means they have five cusps that form a Y-shape when viewed from above.
They are primarily herbivores and feed on leaves, stems, and other plant material, although they have been known to eat ants and termites when food is scarce.
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The extracellular fluid compartment includes what fluids? Check all that apply.
A)Interstitial fluid
B)Blood plasma
C)Cerebral spinal fluid
D)Pleural and pericardial fluid
E)Cytoplasm
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The extracellular fluid compartment includes Interstitial fluid, Blood plasma, Cerebral spinal fluid, Pleural and pericardial fluid. The correct options are A, B, C, and D.
Extracellular fluid (ECF) refers to all the body fluids that are outside of cells.
This includes interstitial fluid, blood plasma, cerebrospinal fluid, pleural and pericardial fluid, and synovial fluid. Cytoplasm is not considered extracellular fluid as it is contained within cells.
The extracellular fluid (ECF) plays a vital role in maintaining the body's homeostasis by providing nutrients to cells and removing waste products from them. Some of the key uses of extracellular fluid include: Transport, Waste removal, and Buffering.
Thus, the correct options are A, B, C, and D.
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What are the sources of genetic variation during Meiosis?
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Explanation:
Genetic variation is increased by meiosis
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I
In a group of Syrian hamsters, some individuals have straight fur and others have wavy fur. In this group, the gene for the fur texture trait has two alleles. The allele for wavy fur (f) is recessive to the allele for straight fur (F).
Complete the Punnett square below to show all possible genotypes of the offspring from a cross between two Syrian hamsters.
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Answer:
Therefore the genotype would be;FF 25% Homozygous straight furff 25% Homozygous wavy furFt 50% Heterozygous mixExplanation:
Genotype describes the combination of alleles that an individual has for a certain gene
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What is the only cranial nerve that has fibers that enter and leave the skull through different foramina? (hint: it enters through the foramen magnum and leaves through the jugular foramen.)
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The Accessory Nerve (XI) is the only cranial nerve that has fibers that enter and leave the skull through different foramina.
The Accessory Nerve (XI):
Efferent nerves from the brainstem and spinal cord give rise to cranial nerve 11. They help to enable phonation and movements of the head and shoulders when they leave the skull through the jugular foramen. The accessory nerve is joined by sensory fibers from the cervical plexus, giving its target muscles general sensation. The accessory nerve divides into spinal and cranial portions.What is a foramen?
An opening that allows the movement of structures from one area to another is called a foramen (plural foramina). The term "cranial foramina" refers to the numerous foramina in the base of the skull that carry cranial nerves, blood vessels, and other structures.The largest cranial foramen is the foramen magnum. It is located in the posterior cranial fossa of the occipital bone and enables the medulla and meninges, vertebral arteries, anterior and posterior spinal arteries, and dural veins to pass through. Through the foramen magnum, the spinal division of the accessory nerve ascends to join the cranial division. The united nerve then leaves the body through the jugular foramen.The petrous portion of the temporal bone forms the jugular foramen anteriorly, while the occipital bone forms it posteriorly.Thus, the Accessory Nerve (XI) enters through the foramen magnum and leaves through the jugular foramen.
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If O2 is available, all components of the mitochondrial ETC will accumulate in their reduced/oxidized form. If O2 is suddenly added again, the electron carriers in cytochrome c oxidase will become reduced/oxidized before/after those in NADH dehydrogenase.
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If O2 is available, the components of the mitochondrial Electron Transport Chain (ETC) will accumulate in their oxidized form. If O2 is suddenly added again, the electron carriers in cytochrome c oxidase will become reduced before those in NADH dehydrogenase.
The Electron Transport Chain (ETC) is a series of protein complexes located in the inner mitochondrial membrane. It transfers electrons from electron donors, such as NADH, to electron acceptors, such as O2. In the absence of oxygen (O2), the ETC cannot transfer electrons, and the electron carriers (such as cytochrome c oxidase and NADH dehydrogenase) accumulate in their oxidized form.
When O2 becomes available, it acts as the final electron acceptor, leading to the reduction of the electron carriers. The electron carriers in cytochrome c oxidase, being closer to the final step of electron transfer, become reduced first, while the electron carriers in NADH dehydrogenase, located earlier in the chain, become reduced afterward.
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Through interaction with the hypothalamus, the ______ gland detects when the optimal level of hormones has been reached and maintains it with additional gonadotropin secretions.
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Through interaction with the hypothalamus, the pituitary gland detects when the optimal level of hormones has been reached and maintains it with additional gonadotropin secretions.
What are hormones?Hormones are molecules which serve as chemical messengers in the body.
The site of action of hormones are at far not close to where they are secreted, and are therefore, transported in blood to their site of cation.
Hormones are secreted by endocrine and exocrine glands.
The master gland of the body is the pituitary gland. The hormones secreted by the pituitary gland controls the activities of other hormones.
In conclusion, hormones are chemical messengers in the body.
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HELP YO BOY OUT‼️‼️‼️‼️‼️
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Answer: ok so im so mixed up between A & C
Explanation: because Deoxyribonucleic acid (DNA) is a molecule that contains the instructions needed for an organism to develop and function. These instructions are stored as a code made up of 4 chemical bases: adenine (A), guanine (G), cytosine (C) and thymine (T). butttttt its simlier to a gene : segment of a DNA molecule (a sequence of bases) Which that'd be A ... that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism., im pretty sure its C but it could also be A... hope this helps :/. good luck!!
Environmental factors can influence the way genes are ________________.
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Answer:
expressed
Explanation:
Factors in the environment affects how your genes are expressed and shown.
2 Which of the following statements is NOT true regarding the element carbon?
A Carbon can only form a few types of chemical compounds.
B Carbon may be found in many types of molecules.
C Carbon can bond to other molecules in a variety of ways.
D Carbon is a critical element found in all biological organisms.
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Answer:
A.) Carbon can only form a few types of chemical compounds.
Explanation:
A.) is correct because carbon is actually found in a large variety of compounds, such as proteins, carbohydrates, fats, etc.
B.) is incorrect because as stated above, it is correct to say that carbon is found in a ton of different molecules.
C.) is incorrect because carbon can form many different types of bonds depending on what it's bonding to. It also can engage in many types of intermolecular attractions.
D.) is incorrect because all life on Earth contains carbon. All organic substances include carbon in some way.
It can create single, double, and triple bonds, carbon is a versatile substance. In addition, when joined with other carbon atoms, it can form rings, branched rings, and chains. Thus, option A is correct.
What are the important property of carbon elements?The ability of carbon to establish stable bonds with numerous elements, including itself, is the cause. This property allows carbon to exist in a wide variety of extremely large and complex molecules. In reality, the number of carbon-based molecules in living things is around 10 million!
Since carbon has a valency of four, it can associate with other atoms or elements to create covalent bonds. Tetra valency is the name given to this quality. When carbon atoms join together to create lengthy chains, this element can form. Catenation is the name of this characteristic.
Therefore, It exists in two or more crystalline forms in the same physical condition. Graphite and diamond are the two most widely used carbon allotropes.
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I NEED HELP!!
"describe what happens to whitelight when it passes through a glass prism and explain why."
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Answer:
As light passes through a prism, it is bent, or refracted, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount.
the light gets dispersed and there is a formation of a seven colours spectrum
what is the missing word
cells ________ during development to perform different functions
Answers
Answer:
Differentiate
Explanation:
Answer:
differentiate or specialise
Which number represents an organism that is an ancestral species to both lizard and a mouse but not a perch lamprey?
a) number 1
b) number 2
c) number 3
d) number 4
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The number 3 represents an organism that is an ancestral species to both lizard and a mouse but not a perch lamprey. The correct answer is option c) number 3.
An ancestral species to both lizard and mouse but not a perch lamprey would imply that the organism shares a common ancestor with lizard and mouse, but not with perch lamprey. Looking at the given options, number 3 is the only number that satisfies this condition. Lizard and mouse must have evolved from a common ancestor, which is represented by number 3. On the other hand, perch lamprey is a different lineage and does not share a common ancestor with lizard and mouse.
The correct answer is option c) number 3.
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