Question

In an autosomal dominant disorder such as Huntington’s two heterozygous parents have the probability of passing the affected gene onto ________percent of their children.

A). 0%

B). 25%

C). 50%

D). 75%

E). 100%

Huntington’s disease is a dominant lethal allele. Why does it stick around in the population if it kills everyone who has it?

A). It is a rare allele

B). Huntington proteins build up in the brain and cause death during middle age

C). Huntington’s disease is epistatic

D). Huntington’s cannot be detected at birth

E). None of these are correct

Type AB blood is a result of ______________________________.

A). polygenic inheritance

B). simple dominance

C). codominance

D). sex-linked recessive inheritance

E). pleiotropy

In a no glucose, no lactose situation, the galactoside permease gene would be:

A). transcribed at high levels

B). not transcribed at all

C). transcribed, but at low levels

D). none of the above