Huntington’s disease: Huntington’s disease is a disease in which certain parts of the brain waste away; symptoms usually begin later in life. In a community in Venezuela, an allele for Huntington’s disease (represented by the letter H) is completely dominant to the allele for no Huntington’s disease (represented by a lowercase h). The three possible parental genotypes are HH, Hh, and hh. There are six possible crossings that can be made between these genotypes (for example, HHxHH, HHxHh, etc.). Show the probabilities of the genotypes and phenotypes in the F1 generation from all six possible crossings. In real human families, would you see offspring in proportions equivalent to these probabilities? Why or why not?
Answers
Answer:
Regarding Huntington's disease, it can be said that it is an inherited disease with an autosomal dominant character, so it is enough that one of the children inherits one of these characters to manifest this neurodegenerative disease, it is considered that the pattern is usually 50% of the total of children of sick parents can suffer it, however if both parents are carriers the number rises leading to 100% of the children affected, on the contrary if no parent has the dominant gene and are homozygous recessive, neither your children will suffer the disease
The possibilities are the following:
Parent 1, inheritance pattern: Hh * hh, the possible gametes for this cross-linking are H, H, h, h, offspring; Hh, Hh, hh, hh 50% of the children could be sick
Parents 2, inheritance pattern: hh * hh, the possible gametes for this cross-linking are h, h, h, h. the offspring will be; hh, hh. no sick child
Parent 3, inheritance pattern: HH * HH, the possible gametes for this cross-linking are H, H, H, H, the offspring will be HH, HH, all children may be sick, 100%
parents 4, inheritance pattern: Hh * Hh, the possible gametes for this cross-linking are h, H, h, H. the descendants will be HH, Hh, Hh, hh 50% of sick children
Parents 5, inheritance pattern: Hh * hh, the possible gametes for this interbreeding are H, h ,, offspring will be Hh all sick children
Parent 6, inheritance pattern: Hh * Hh the possible gametes for this cross-linking are H, h, the descendants will be Hh, the heterozygous descendants will have the disease.
Related Questions
"How does shade affect plant growth?"
Answers
It will affect the plant growth entirely. If it is a plant that needs sunlight to grow it will not grow but if it is a plant that needs shade it will depend on the hade to grow
Explanation:
Worksheet 5 Cell Division for students answerkey from umuc
Answers
Answer:
binary fission,meiosis and
mitosis,
The carbon cycle involves a variety of processes that transfer carbon among Earth systems. Many of these processes also transfer which one!
element?
o A oxygen, which bonds with carbon in carbon dioxide
B. nitrogen, which bonds with carbon in amino acids
C. phosphorus, which bonds with carbon in DNA
D. chlorine, which bonds with carbon in a variety of compounds
Answers
A oxygen, which bonds with carbon in carbon dioxide
what is sugar converted into if your body does not metabolize it
Answers
Answer: It's starts burning body fat.
Explanation:
Scientists are studying a genetic disorder. They discover that when both parents are carriers, and do not express the disorder themselves, their children have a 25% chance of developing the disorder. If only one parent is a carrier, none of the children express the disorder. What type of disorder are they most likely studying?
Answers
The genetic disorder that the scientists are most likely studying is an autosomal recessive disorder.
What is the autosomal recessive disorde?In this type of disorder, a person needs to inherit two copies of the mutated gene, one from each parent, to develop the disorder. When both parents are carriers of a recessive gene mutation, there is a 25% chance that each of their children will inherit two copies of the mutated gene, and therefore develop the disorder.
However, if only one parent is a carrier, the children will inherit one copy of the normal gene from that parent and one copy of the mutated gene from the other parent, and therefore will not develop the disorder.
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The essentials that turtles, albatross and whales need to survive, how they fulfill their needs and how their movements may contribute to meeting them
Answers
Answer:
depends on the environment your in
Explanation:
Turtles, albatross, and whales depend on a combination of land and water resources and their movements between them help in their survival.
What are amphibians?
Any member of the group of vertebrate animals distinguished by their capacity to utilize both aquatic and terrestrial environments is referred to as an amphibian (class Amphibia). The word amphibian, which means "living a double life" in Greek, refers to this dual lifestyle, even though some species are entirely aquatic and others are permanent terrestrial residents.
There are now 8,100 different species of amphibians. They first appeared during the Middle Mississippian Epoch, around 340 million years ago. They were one of the first groups to depart from the ancestors of fish-tetrapods when animals evolved from purely aquatic forms to terrestrial ones.
Frogs and toads (order Anura), newts and salamanders (order Caudata), and caecilians are today's amphibians (order Gymnophiona). Despite having remarkably distinct body types, these three groups of contemporary amphibians—which are assumed to have descended from a single radiation of prehistoric amphibians—are most likely the closest relatives of one another.
Therefore, the survival of amphibians is dependent on land and water resources.
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Using your food chains above and other organisms from your list; construct one food web for your ecosystem. The food web must contain at least 12 organisms in it.
Answers
The image shows the organisms in the food web. This is a food web in a pond. Producers includes water lily and duck potato. Consumers includes ducks, frogs, pond skaters, water beetles, water snails, fish, water beetles, water scorpion, dragonflies, mosquito, duckling, leech, newt, and tadpole.
A pond ecosystem includes biotic and abiotic factors that are having physical and chemical interactions with each other.
A student astronomer went outside and made two observations of the Moon that were several days apart. Her observations are shown in the diagram above. The light part of the Moon appeared to get smaller over time. Why did this happen?
Answers
Answer:
The light part of the Moon appeared to get smaller over time because of the change in the relative position of the Moon, the Sun, and the Earth. This is known as the lunar phase. The changing appearance of the Moon from the Earth's perspective is caused by the Moon's orbit around the Earth and the position of the Moon and Sun relative to the Earth. The Moon's phases are caused by the angle between the Moon, Earth, and Sun changing, as the Moon orbits the Earth. When the Moon is between the Earth and the Sun, the side facing the Earth is not illuminated by sunlight, so it appears dark, and this is called a new moon. When the Moon is on the opposite side of the Earth from the Sun, the entire side of the Moon facing the Earth is illuminated by sunlight, so it appears full, and this is called a full moon. As the Moon moves in its orbit, the angle between the Sun, Earth, and Moon changes, causing the illuminated portion of the Moon visible from the Earth to change, leading to different lunar phases.
Put the steps of our solar system's formation in the order scientists think they happened. 1₁ A cloud of gases and dust collapsed and formed a swirling disk as gravity pulled the matter together. Gravity pulled most of the mass in the disk of gas and dust to the center as the Sun formed. ++ Planets formed regular orbits around the Sun because of gravity and inertia, Planets formed as materials in the swirling disk stuck together and were held together by gravity.
Answers
solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust.
How was solar system's formed step by step?The Sun and the planets formed together, 4.6 billion years ago.from a cloud of gas and dust called the solar nebula.A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula.The Sun formed in the center, and the planets formed in a thin disk orbiting around it.The planets, in order of their distance outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Four planets—Jupiter through Neptune—have ring systems, and all but Mercury and Venus have one or more moons.Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.To learn more about solar system refers to;
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I really need help with this, mainly because I just don't wanna do it.
I have an F in this class and I need to bring my grade up.
Answers
Which type of organism is found in Kingdom Archaebacteria?
O protozoa
o methanogens
o fungi
o algae
Answers
Answer:
i had this question back in 6th grade i think its fungi
Explanation:
how are the reproductive cycles of a fungus and a pteridophyte similar
Answers
The reproductive cycles of a fungus and a pteridophyte are similar, as Both organisms produce haploid spores and exhibit diploid and haploid stages that is present in option A.
What is the significance of the fungi and pteridophytes?In pteridophytes, sexual reproduction involves the production of gametes in gametangia that fuse to form a zygote, and then through meiosis, the sporophytes are produced that develop into new individuals, while in fungi, the haploid gametes fuse.
Hence, the reproductive cycles of a fungus and a pteridophyte are similar, as Both organisms produce haploid spores and exhibit diploid and haploid stages that is present in option A.
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The question is incomplete, the most probably complete question is below,
How are the reproductive cycles of a fungus and a pteridophyte similar?
A.) Both organisms produce haploid spores and exhibit diploid and haploid stages.
B.) Both organisms form fruiting bodies that produce diploid seeds.
C.) Both organisms exhibit a diploid stage and are only able to reproduce asexually.
D.) Both organisms reproduce sexually when two haploid hyphae fuse.
What evidence have you discovered to explain how plants, such as the
sunflowers in the video, use sunlight to produce energy?
Answers
Sunlight causes the leaves of a sunflower to turn phototropically, following the sun's rays. The amount of light intercepted rises as a result, which boosts photosynthesis.
What reaction does a sunflower have to sunlight?The stem's east side develops during the day, causing it to swing to the west with the sun. The general growth begins to slow down as the sunflower ages.
On a sunflower, how does photosynthesis take place?Sunflower uses the C3 photosynthetic pathway and is a photosynthetic autotroph. The sugars created during photosynthesis are delivered as sucrose from the leaves to growing seeds, where they are utilised to create the oils found in sunflower seeds, among other processes.
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Sleep is important for which memory process?
a. Perception of sensory information in the sensory register
b. Consolidation of short-term memories into long-term memories
c. Formation of flashbulb memories
d. Holding material in the eidetic engine
Answers
Explanation:
Dreams and sleep allow us to process information received throughout the time awake
Nuclear pores regulate the passage of substances into and out of the nucleus. Antibodies such as mAb414 have been used to inhibit the movement of substances through the nuclear pores of rat liver cells. Scientists cultured rat liver cells (eukaryotic) and bacteria cells (prokaryotic) in separate dishes with radioactively labeled amino acids. A specific gene in both cell types was engineered to synthesize identical polypeptide chains, and translation of this gene was measured. The procedure was repeated with mAb414 (the inhibitor) added to each of the two cell cultures, and translation was monitored again.
Required:
Draw the graphs that best summarizes the results of the experiments?
Answers
The graphs that best summarizes the results of the experiments are attached below
Aim of experimentThe aim of these experiments is to explain translation in the prokaryotes and eukaryotes. Translation is the production of protein from mRNA through translating a sequence of mRNA molecule to sequence of amino acids.
In eukaryotes, translation occurs in the cytoplasm therefore mRNA in the nucleus is transported to the cytoplasm, while in prokaryotes the cytoplasm acts as the nucleus hence no need for the transportation of mRNA via Nuclear pores to the nucleus.
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What are the unique characteristics of the garden pea that allowed George Mendel (the father of genetics) to study them successfully?
Answers
Mendel chose the pea, one of many species, to study because the plants and seeds exhibit a variety of distinctive characteristics that appear in two readily recognizable forms (e.g., seed shape is round or wrinkled; plant height is tall or short).
George Mendel, the father of genetics, chose pea plants for his genetic experiments for a variety of reasons, including
• Garden plants are simple to grow.
• Pea plant blooms are hermaphrodites, which means they exhibit traits of both sexes.
• Plants of the pure breed can be easily obtained through self-fertilization.
• Pea plants produce more quickly than other plants.
• They have a high rate of survival and remarkable disease resistance.
Gregor Mendel's research on pea plants led him to the fundamental ideas of inheritance. He came to the idea that genes are passed down from each parent as unique, paired units.
Mendel observed how parental genes separated and if they showed up as dominant or recessive qualities in the offspring. Gregor Mendel experimented with hybridization on about 29,000 pea plants. Mendel found that peas were the perfect subject since they possessed seven easily observable features that he could control. He set up two settings before starting his pea studies.
As a result, we can infer that Mendel chose the pea as the species to study out of all the others since it has a diversity of distinguishing traits in both its plants and seeds.
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What is the ploidy of daughter cells produced after Meiosis I and Meiosis II?
Answers
Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells while maintaining the number of chromosomes in each cell.
After meiosis 1, what is the ploidy of the daughter cells?The DNA ploidy number is 2N at the end of meiosis I, and it is 2N at the end of meiosis II., it is 1N. The cell repeats its DNA during DNA replication before meiosis.
How many ploidies are there in meiosis 1 and 2?While Meiosis II divides the remaining set of chromosomes in a mechanism akin to mitosis, Meiosis I reduces the ploidy level from 2n to n (reduction) (division). Meiosis I is when the majority of the distinctions between the processes take place.
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two of the risk factors for down syndrome include which of the following?
Answers
Answer:
Risk factors include: Advancing maternal age. A woman's chances of giving birth to a child with Down syndrome increase with age because older eggs have a greater risk of improper chromosome division. A woman's risk of conceiving a child with Down syndrome increases after 35 years of age.
Answer:
advancing maternal age.
Explanation:
NEED HELPPPPP FIFTY POINTSSSSS
Answers
Here is a diagram showing the energy sources or forces that drive the processes in the diagram:
[Diagram of the water cycle with labels for solar energy, wind energy, tidal force, and gravitational force]
Solar energy is the ultimate source of energy for all of the processes in the water cycle. It heats the Earth's surface, which causes water to evaporate.
Wind energy is created by the uneven heating of the Earth's surface. The warm air rises, and the cooler air rushes in to take its place. This creates the wind, which can help to distribute evaporated water around the globe.
Tidal forces are caused by the gravitational pull of the moon and the sun on the Earth's oceans. The moon's gravity is stronger than the sun's, so it has a greater effect on the tides.
Gravitational force is the force that pulls objects towards each other. It is what keeps the Earth in orbit around the sun and the moon in orbit around the Earth. It also pulls water down towards the Earth, which is why we have oceans.
All of these energy sources and forces work together to create the water cycle, which is essential for life on Earth.
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Fossil fuels such as oil and coal are made from highly condensed ___ in the soil.
A. Carbon
B. Hydrogen
C. Oxygen
D. Nitrogen
Answers
A. Carbon
It's carbon because it is in all plants and fossil fuels. Hope this helps and is correct.
Which of the following nutrient provide more energy? a. Protein b. Carbohydrate c. Lipids d. Vitamins
Answers
The nutrient which provide more energy is C. Lipids
Among the given options, lipids provide the most energy per unit mass. Lipids, also known as fats, are a concentrated source of energy in the diet. When metabolized, lipids yield approximately 9 kilocalories (kcal) of energy per gram.
Carbohydrates, including sugars and starches, provide approximately 4 kcal of energy per gram. They are a readily available source of energy for the body, particularly for short-term energy needs. Proteins also provide approximately 4 kcal of energy per gram. However, their primary role is not as an energy source but rather as the building blocks for tissues, enzymes, and other important molecules in the body.
Vitamins, on the other hand, do not provide significant energy. They are essential for various biochemical processes in the body but do not contribute directly to energy production.
It is important to note that while lipids provide the most energy per gram, the overall balance and variety of nutrients in a diet are crucial for maintaining optimal health. Nutrient needs vary based on individual factors, such as age, sex, activity level, and overall health goals. Therefore, Option C is correct.
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An error during S phase would be most likely to affect a multicellular
organism in what way?
A. The organism develops cells that are too small.
B. The organism develops cells that are too large.
C. The organism develops cells with DNA that contains errors.
D. The organism develops cells with too few or too many organelles.
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Answer: D
Explanation: Hope this helps! excuse me if i'm wrong:)
Why does anaerobic respiration occur during vigorous exercise?
Answers
Answer:
Because the body supply of oxygen is less than the body requirement of oxygen for aerobic respiration.
During a strenous activity,the supply of oxygen do not reach body requirement for aerobic respiration to occur, that is why ,therefore fermentation anaerobic respiration occurs and the end product is lactic acid which then accumulates in the muscles.
Answer:
This is because,during vigorous excercise,oxygen supply is smaller than body requirement of oxygen and therefore anaerobic respiration occur .
Since anaerobic respiration occurs in the absence of oxygen.
the equilibrium potential for a cation is 120 mv. which of the following statements is true when a cell is at the resting membrane potential (-70 mv)?
Answers
When the cell is at the resting membrane potential (-70 mv), both the chemical and electrical forces are channeled into the cell.
Define resting membrane potential
The electrical potential difference across the plasma membrane of a cell during its non-excited condition is referred to as the resting membrane potential of the cell. The value of the electrical potential difference inside a cell compared to the extracellular environment is traditionally used to describe the electrical potential difference across a cell membrane.
Any ion's equilibrium potential value is determined by the gradient of that ion's content across the membrane. The force of the concentration gradient and the equilibrium potential would both be zero if the concentrations on the two sides were identical.
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Problem arising that need solution wen doin seed priming
Answers
Answer: light, aeration, temperature, time and seed quality
How do the layers of the atmosphere help to understand better the dynamics of the atmosphere and its relationship to the hydrosphere and lithosphere?
Answers
There are various layers that make up the atmosphere, and each has distinct properties and functions. Both weather generation and energy transmission take place in the troposphere, which is closest to the Earth's surface.
The stratosphere shields the Earth from damaging UV radiation along with the ozone layer. Most auroras happen in the mesosphere, where meteors burn up. Modern technology is dependent on the thermosphere, where the majority of the Earth's satellites orbit and where communication signals are sent.
The dynamics of the atmosphere and its interactions with the hydrosphere and lithosphere are better understood thanks to these layers. Foreseeing and minimising environmental problems like climate change and preserving our world, it is essential to understand the significance of each layer.
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The fact that all mammals have mammary glands that produce milk for their young is evidence that all mammals have a ____?
Answers
Answer:
The fact that all mammals have mammary glands that produce milk for their young is evidence that all mammals have a common ancestor.
Explanation:
This is because the presence of mammary glands is a shared characteristic that evolved in the common ancestor of all mammals, and has been passed down to all of their descendants through the process of evolution by natural selection. This shared characteristic is an example of a homologous trait, which is a trait that is similar in different species because it was inherited from a common ancestor.
This organelle is termed biosynthetic factory in the cell-
endoplasmic reticulum
Golgi apparatus-
is the organelle known to sort and package items.
Are these correct ?
Answers
Answer:
The first one is correct.
Second one is also correct but u could add this just in case if u want to:
Golgi apparatus- modifies, sorts and packages protein for secretion out of the cell
Describe how the components of a meal containing fried fish and toast bread will be processed as they move through the digestive system of man
Answers
Answer:
Explanation:
When a meal containing fried fish and toast bread is consumed, it goes through a series of processes in the digestive system of a human. Here's a general description of how the components are processed:
1. Mouth: The process of digestion begins in the mouth. Chewing breaks down the toast bread and fish into smaller pieces, while saliva mixes with the food to start the breakdown of carbohydrates.
2. Esophagus: The chewed food, now called a bolus, is swallowed and travels down the esophagus through peristaltic contractions. The esophagus carries the food to the stomach.
3. Stomach: The stomach is responsible for further mechanical and chemical digestion. It mixes the food with stomach acid and digestive enzymes to break down proteins. The fried fish is broken down into smaller pieces through mechanical churning.
4. Small Intestine: The partially digested food leaves the stomach and enters the small intestine. Here, bile from the liver and enzymes from the pancreas break down fats, while other enzymes continue the breakdown of proteins and carbohydrates. Nutrient absorption occurs through the walls of the small intestine and is facilitated by small finger-like projections called villi.
5. Large Intestine: Any remaining undigested food, as well as water and electrolytes, pass into the large intestine. The large intestine absorbs water and electrolytes while forming waste material known as feces.
6. Rectum and Anus: The feces are stored in the rectum until elimination through the anus occurs during a bowel movement.
Throughout this process, various digestive enzymes and gastric juices are secreted at different stages to facilitate the breakdown and absorption of nutrients. The fried fish and toast bread are broken down into smaller molecules, such as proteins, carbohydrates, and fats, which are then absorbed into the bloodstream to provide energy and nourishment for the body.
Hello.
All of the DNA in the nucleus of a cell can potentially be mutated?
True or false?
I will give brainly
Answers
Answer: True. Yes it could potentially be mutated.
Explanation: