Ans.
Albinism shows a genetic disorder, which is characterized by absence of coloration or pigmentation in individuals. It is an autosomal recessive disorder that transmits from parents to their offspring, when offspring receives both the mutated copies of gene responsible for albinism.
For a genetic disorder, dominant or wild type allele is represented by capital letter, such as 'A', while recessive or mutated allele is represented by small letter, 'a'. As 4th picture is representing male and female gametes with recessive alleles (a) , the resulting zygote will have both recessive alleles for albinism (aa), '4th zygote will develop into an albino child.'
Explanation:
d decides to join the brown horse population, adding the
white horse gene to the brown horse population
19. -9 Insects and Bats did
both developed
20.
There are tan mice
desert.
whiter
easily seen by snakes
so over time, the tan :
• prevalent because they
and reproduce.
21
Because it is colder during the winter, the bears that live north grow thicker fur to protect them from
the freezing temperatures
Answer:
The correct answer is - incomplete dominance.
Explanation:
A inheritance pattern that is characterized by pattern in which the one allele is not completely dominant over the its recessive variant of the allele and due to its incomplete dominance a third phenotype expressed over, termed as the incomplete dominance.
In the case of the familial hypercholesterlemia, it is genetic disorder in which the individual lacks the receptors on liver cells remove cholesterol from the blood. This condition occur in the homozygous allele case. In normal people have receptors normal while in heterozygous condition individual have half of the total receptors.
Thus, it is the case of incomplete dominance.
Answer: <u>Prophase
</u>
Explanation: Prophase is the most time consuming part of mitosis. A series of events takes place during prophase. Alignment of microtubules at the poles; condensation of chromatin material; thread-like chromosomes start to appear; nuclear membrane starts to disintegrate. Since figure A and F are showing events of prophase, that's why answer is prophase.
A short chain of the cyanobacterial cells found in the Bitter Springs Chert in northern Australia (about 1 billion years old). The bulk of modern genera really resemble cyanobacteria that are closely related to those that are living today. Unlike this fossilized cyanobacterium.
The fact that microorganisms can even leave fossils may surprise you. The oldest cyanobacteria-like fossils, which are among the oldest fossils ever found, are from the Precambrian, but one specific type of bacterium, the cyanobacteria or "blue-green algae," has left a fossil record that extends all the way back to that time. Larger than other bacteria, cyanobacteria have the ability to produce a thick cell wall. More crucially, cyanobacteria have the ability to form enormous, layered structures known as stromatolites or oncolites, depending on whether or not they resemble domes (if round).
Learn more about cyanobacteria, here
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