It is found that in cha-cha chickens, the allele for a double comb (A) is dominant to the allele for a single comb (a). A mother with the genotype Aa and a father with the genotype Aa produce an offspring.
What is the percent chance that the offspring will have a single comb?
Word Bank:
25 50 100 0 75
The genotype of the mother is Aa, which means she has one dominant allele (A) for double comb and one recessive allele (a) for single comb. The same applies to the father, whose genotype is also Aa.
When two individuals with the genotype Aa reproduce, there are four possible combinations of alleles that can be passed on to the offspring: AA, Aa, aA, and aa.
Of these four combinations, only one (aa) represents the genotype for a single comb. Therefore, the offspring has a 25% chance of having a single comb.
Hence, the answer is 25%.