Question

Autosomal recessive traits often appear in pedigrees in which there have been consanguineous matings because these traits:

a) Are more common in unrelated individuals.
b) Tend to result from μtations in non-repetitive DNA.
c) Require two copies of the recessive allele for expression.
d) Are linked to the X chromosome.

Answer 1

Autosomal recessive traits appear in pedigrees in which there have been consanguineous matings because these traits require two copies of the recessive allele for expression.

Step-by-step explanation:

Autosomal recessive traits appear in pedigrees in which there have been consanguineous matings because these traits require two copies of the recessive allele for expression. When two carriers of a recessive trait have a child, there is a 25% chance that the child will inherit two copies of the recessive allele and display the trait. This is more likely to occur in consanguineous matings where the parents are more likely to carry the same recessive allele.