Answer the following questions for autosomal conditions such as PKU.

If both parents are heterozygous carriers of a mutant allele, what is the chance that their first child will be homozygous recessive for the mutation?

Question

Accepted Answer

Hey, everyone. Let's take a look at this question together. If both parents of a child are hetero zegas carriers of the mutant allele or P K, you what is the probability that their first child will be home as a guest recessive or the mutation? So we know that P K U is and Auda's omo recessive disorder, Which means that we need two copies to express the disorder, meaning that the genotype of a person who is expressing the disorder has to be a massage Vegas or the recessive allele. And since we know that both parents of this child are heterosexuals carriers, that means that both parents have that heterocyclic genotype. And we know that across between two parents who are heterosexual, this results in a 1/4 percent chance of the child being Hamas Agus recessive, which means we have a 25% chance of that Hamas Agus recessive genotype. So answer choice. A 25% is the correct answer because if both parents of a child are heterosexuals carriers of the mutant allele for P K U, the probability that their first child will be home as a guest recessive for that mutation is 25% Or 1/4 when we do the cross between the two parents. So answer choice, a 25% is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

Answer the following questions for autosomal conditions such as PKU.

If both parents are heterozygous carriers of a mutant allele, what is the chance that their first child will be homozygous recessive for the mutation?

Verified video answer for a similar problem:

Key Concepts

Autosomal Recessive Inheritance

Punnett Square

Genotype Probability

Answer the following questions for autosomal conditions such as PKU.If both parents are heterozygous carriers of a mutant allele, what is the chance that their first child will be homozygous recessive for the mutation?

Verified video answer for a similar problem:

Key Concepts

Autosomal Recessive Inheritance

Punnett Square

Genotype Probability

Answer the following questions for autosomal conditions such as PKU.

If both parents are heterozygous carriers of a mutant allele, what is the chance that their first child will be homozygous recessive for the mutation?