Question

question 31
two healthy individuals have a child who has huntington disease, an autosomal dominant disease. how did this happen?
a the mother had two recessive alleles.
b the mother had one recessive allele and one normal allele, and the father had two normal alleles.
c the mother had two normal alleles, and the father had one recessive and one normal allele.
d each parent had one normal and one recessive allele.
e the condition could not have been inherited from these two parents.
question 32
humans have ___ total nuclear chromosomes.
a 23
b 22
c 44
d 46

Explanation:

For Question 31, Huntington disease is autosomal - dominant. Healthy individuals do not have the dominant allele for the disease. So, a child with the disease cannot inherit it from two healthy parents. For Question 32, humans have 23 pairs of nuclear chromosomes, which means a total of 46 nuclear chromosomes.

Answer:

Question 31: E. The condition could not have been inherited from these two parents.
Question 32: D. 46