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?
To determine the percent chance that the offspring will have a single comb, we need to consider the possible combinations of alleles that can be inherited from the parents.
The mother has the genotype Aa, which means she has one allele for the double comb (A) and one allele for the single comb (a).
The father also has the genotype Aa, meaning he also has one allele for the double comb (A) and one allele for the single comb (a).
When the offspring is created, there are four possible combinations of alleles that they can inherit from their parents:
1. They can inherit the A allele from the mother and the A allele from the father, resulting in a genotype of AA. This offspring would have a double comb.
2. They can inherit the A allele from the mother and the a allele from the father, resulting in a genotype of Aa. This offspring would also have a double comb.
3. They can inherit the a allele from the mother and the A allele from the father, resulting in a genotype of aA. This offspring would also have a double comb.
4. They can inherit the a allele from the mother and the a allele from the father, resulting in a genotype of aa. This offspring would have a single comb.
Out of these four possibilities, only one results in an offspring with a single comb. Therefore, there is a 25% chance that the offspring will have a single comb.
To convert this to a percentage, we can multiply 25% by 100, resulting in a 25% chance that the offspring will have a single comb.