Brittany and Jarod have been trying to have a second child for 10 years.They have one healthy child,but Brittany has had four early,spontaneous abortions.The most likely explanation for the many pregnancy losses is that Brittany and Jarod
A)are not having sex frequently enough.
B)are each heterozygous for lethal alleles of the same gene.
C)are each homozygous for lethal alleles of the same gene.
D)have different alleles for all of their vital genes.

Question

Quizplus · Accepted Answer

Brittany and Jarod are likely each heterozygous for lethal alleles of the same gene, which can result in spontaneous abortions when the fetus inherits two copies of the lethal allele.

Brittany and Jarod Have Been Trying to Have a Second