Question

genetic inheritance: autosomal recessive inheritance
to inherit an autosomal recessive disorder requires a person to receive the disease - causing allele from
multiple choice
the father only.
the mother only.
both parents.
only the parent having the disease.
only one parent who is homozygous recessive for the disease.

Explanation:

Autosomal recessive inheritance means that a person needs two copies of the disease - causing allele (one from each parent) to have the disorder. If only one parent contributes the allele, the person will be a carrier (heterozygous) but not have the disorder. So, to inherit the disorder (homozygous recessive), both parents must contribute the disease - causing allele.

Answer:

both parents.