Question

1a. Which one of these statements is true regarding a fixed allele?

A. In a population, it's an allele with no other allele options

B. Two alleles, at any locus, that are identical

C. An event that increases the frequency of all alleles

D. None of the other answers are correct

1b. True or false. A phenotype requires at least two alleles.

Answer 1

Answer 1a:

Option A - In a population, it's an allele with no other allele options.

A fixed allele is the only variant that exists for that gene in all the population. In other words a fixed allele is homozygous for all members of the population.

Answer 1b: True.

Two alleles are inherited by offspring, one from each parent and hence there will be two alleles which may neither be dominant nor recessive. In few cases there is one dominant and other recessive, while at times there is co-dominance while phenotype is expressed.

answered by: anonymous