Question

Person with a hearing disability marries a woman with a hearing disability. Assume that the phenotype is autosomal dominant, than the defective gene is not the same in these two individuals and that the two genes do not complement each other. Given these, what is the probability that a child born to this couple would have a normal hearing ability

Answer 1

Child born baby would have a normal hearing ability

Answer 2

25%

Explanation:

Autosomal dominant disorder is a disorder caused by the presence of only one mutated allele in the genotype and the disorder will never skip the generation. The chances of the affected offspring increases when the mutated gene is passed on to the offspring.

In the given question, suppose

Dominant mutated allele is A

recessive normal allele is a

If both the parents are affected then,

genotype of parents will be- Aa or AA

Considering the heterozygous condition of both parents

1. Male- Aa and female-Aa

crossing we will have Aa x Aa                        

              A     a

    A     AA    Aa

   a       Aa     aa

In this genotype, all the alleles except aa has no mutated allele out of four alleles. Therefore the probabilty of normal child is 25%

To learn more:

1. Autosomal dominant trait: https://brainly.in/question/6666631

2. Heterozygos condition:https://brainly.in/question/3425316