Julie has a genetic disorder.Julie and her husband,Shane,have three children,none of which have the genetic disorder.How is this disorder most likely inherited?
A) autosomal dominant
B) autosomal recessive
C) heterozygous dominant
D) The environment influences the trait instead of the genetics.
E) 100% inheritance from the father since the children are not affected.

Question

Quizplus · Accepted Answer

If this is an autosomal recessive disorder, then Julie's genotype is aa. If Shane's genotype is AA, none of their children will have the genetic disorder. If Shane's genotype is Aa, then half of their children may be affected. If this were an autosomal dominant disorder, then Julie's genotype is AA or Aa. Shane would be aa. Then either all or half of their children would be affected.

Julie Has a Genetic Disorder