Cal suffers from metabolic insufficiency X (MIX)disorder.His mother also has MIX disorder,but his father does not.What can we conclude?
A)The MIX gene must be recessive.
B)The MIX gene must be dominant.
C)Cal may or may not pass down the gene for MIX disorder to his children.
D)Cal will pass down the MIX disorder to his children,but they may not get the disease.

Question

Quizplus · Accepted Answer

If Cal inherited the MIX gene from his mother, he would be heterozygous for MIX disorder. Since his father does not have MIX disorder, he must have a normal allele for the MIX gene. Therefore, Cal may pass down the normal allele or the MIX disorder allele to his children. If he passes down the normal allele, his children will not have MIX disorder. If he passes down the MIX disorder allele, his children may or may not express the disorder depending on their genotype.

Cal Suffers from Metabolic Insufficiency X (MIX)disorder