PATHOLOGY MCQ
GENETICS AND DISEASE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
When is a recessive allele expressed in offspring?
|
|
when two copies are present
|
|
|
when parents have no dominant alleles
|
|
|
when the offspring is heterozygous
|
|
|
when one copy is present
|
Explanation:
Detailed explanation-1: -Recessive alleles only express their phenotype if an organism carries two identical copies of the recessive allele, meaning it is homozygous for the recessive allele.
Detailed explanation-2: -A recessive allele is a version of a gene which must be homozygous when inherited in order to be expressed in the phenotype. If it is inherited alongside a dominant allele, the offspring will not express the recessive allele phenotype, just the dominant allele.
Detailed explanation-3: -Answer and Explanation: An individual that has two copies of the same allele is a homozygote.
There is 1 question to complete.