Why is it necessary to survey a large number of individuals to study multiple al
ID: 309499 • Letter: W
Question
Why is it necessary to survey a large number of individuals to study multiple alleles?
A) A large number of crosses must be carried out to determine the mode of inheritance. B) Multiple allelism always involves at least two recessive alleles. A large number of individuals must be analyzed to determine the mode of inheritance. C) Families contain a limited number of alleles, but populations can contain all of the possibilities. D) Any individual diploid organism can have, at most, two different alleles at a single locus.Explanation / Answer
ANS:
Correct Answer:
D) Any individual diploid organism can have, at most, two different alleles at a single locus.
The multiple allelism is associated with three or more alleles of the same gene, no single diploid organism can have all the alleles in a multiple allele system.
Wrong Answers:
A) A large number of crosses must be carried out to determine the mode of inheritance.
This statement is partially true, but it is not the main reason to survey a large number of individuals to study multiple alleles.
B) Multiple allelism always involves at least two recessive alleles. A large number of individuals must be analyzed to determine the mode of inheritance.
Multiple allelism does not need to have two recessive alleles.
Ex: ABO blood group ( it had one recessive and two dominant alleles).
C) Families contain a limited number of alleles, but populations can contain all of the possibilities.
A single family can contain all possible alleles, so this statement had no sense.
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