It is expected to see in the offspring of a woman who has DMD and a man who does not have the disease that all of their sons and none of their daughters will have the disease
Option A.
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Explanation:</u></h3>
Duchene muscular dystrophy, also known as DMD is a recessive, x-linked disease. It occurs when there is a mutation in the dystrophin gene. This mutation further affects the muscles of the body leading it to degenerate and ultimately death.
When a woman with DMD and a man without DMD have an offspring, their daughters and the sons will get the mutated gene signature from the mother as she is the carrier. But since the father has normal genes, the daughters will become the carriers and will not be afflicted by it. This is because the normal X chromosome from the father will be passed on to them. The sons on the other hand will have the disease as they will get one of their mother's X chromosome which would be carrying the mutated gene.
Answer:
Let the "barred" allele be caller B and the "non-white" allele b. Since chickens use chromosomes 
and 
to determine sex, hens would have chromosomes 
, and roosters would have chromosomes 
. A Z-linked gene is represented as a superscript on the chromosome, 
for the dominant allele and 
for the ressesive allele.
A barred hen would have a copy of B on its Z chromosome, a non-barred rooster would have both copies of b on both Z chromosomes. Using Punnet squares to represent the crosses we get the following cases:
That is a ratio of two barred heterozygote roosters to two non-barred hens. Crossing them we get:
That is a ratio of one barred heterozygote rooster to one barred hen to one non-barred rooster to one non barred hen.
The greenhouse effect is the natural warming of Earth's lower atmosphere and surface.
<u>Explanation:</u>
The idea of climate and temperature around the Earth begins with the sun. Approximately 30% of the sunlight reflects back to the cloud and ice from the surface.
The basic rise of the greenhouse effect is when the sun radiates around the earth.The greenhouse effect is the natural warming of Earth's lower atmosphere and surface. The 30% reflects back where the rest of the energy of the sun is collected by greenhouse effect and radiated to the surface again.
The radiation as well as the absorption of the heat is beneficial to the lower atmosphere as well as the surface as no other foundation can be reflected and radiated by the greenhouse effect.
Since frogs consume plants, it needs to have a longer small intestine so the food has more time to digest and be absorbed because the small intestine helps enthrall nutrients and calories from digested food, so it needs to be long enough so it can go through full digestion.
Explanation:
Preserving and protecting individual species and the ecosystems they inhabit are critical to maintaining biodiversity on Earth. information about the biodiversity of insects. ... This helps scientists learn more about the life cycle of these insects.
