Question

In a species of birds, having wide wings (W) is dominant to having thin wings (w). Which of the following genotypes is INCORRECTLY labeled?

Answer 1

Answer:

The options including the genotypes are not included. On a general note, three genotypes that are possible for this trait including their phenotype is:

WW- Wide wings

Ww- Wide wings

ww- thin wings

Explanation:

This question involves a single gene coding for wings width in a certain bird. The allele for wide wings (W) is dominant over the allele for thin wings (w). This means that allele 'W' will always mask the expression of allele 'w' in a heterozygous state.

There are three possible genotypes considering this trait.

WW- homozygous dominant genotype which wings will be phenotypically wide because it contains a combination of same dominant alleles.

Ww- heterozygous dominant genotype which wings will be phenotypically wide because I this combination of alleles, the W allele will always express itself phenotypically over allele 'w' considering the dominance of W.

ww- homozygous recessive genotype which wings will be phenotype thin because it contains a combination of same recessive alleles.

N.B: a recessive trait will only be expressed in a homozygous condition.