We appreciate your visit to Imagine that beak color in a finch species is controlled by a single gene You mate a finch homozygous for an orange pigmented beak with. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Answer:
A) incomplete dominance.
Explanation:
It is a clear case of incomplete dominance. This kind of inheritance shows deviation from Mendel's popular law of genetics which is known as "Law of Dominance". This law states that when two pure breeding parents i.e. homozygous dominant and homozygous recessive are mated then all their off-springs are genotypically heterozygous but phenotypically they all show dominant trait. But in incomplete dominance, the dominant allele is unable to mask the expression of recessive allele completely which leads to a phenotype which is a blend of both the traits.
In the example, orange beak is unable to mask the expression of ivory beak completely as a result of which all the off-springs have an intermediate trait which is pale, ivory-orange beak.
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Final answer:
The pattern of color expression is most likely an example of incomplete dominance, which results in a blend or intermediate phenotype. An example of incomplete dominance is fruit color in eggplants.
Explanation:
The pattern of color expression you observed in the offspring, where all of them have a pale, ivory-orange beak, is most likely an example of incomplete dominance.
In incomplete dominance, neither allele is completely dominant over the other, resulting in a blend or intermediate phenotype. In this case, the orange allele and ivory allele are not fully dominant over each other, leading to the pale, ivory-orange beak color in the offspring.
An example of incomplete dominance is fruit color in eggplants. The presence of two functional copies of the enzyme results in purple fruit color, while the absence of functional copies leads to white fruit color. With only one functional copy, the color is a lighter shade, similar to the ivory-orange beak color in your finches.
