Question

mtdna mutates at regular rate
mother with a mutation in her mtdna will pass it to all her children
can track human ancestry and build evolutionary tree:
mitochondrial eve - all mtdna of extant humans can from a common ances (mother), therefore all humans are related
value: 10
if you are a male and you have two children, one son and one daughter, which one will get your mothers mtdna?
a. son
b. daughter
c. neither
d. both son and daughter

Explanation:

mtDNA (mitochondrial DNA) is passed from mother to all her children. However, sons do not pass on their mother's mtDNA to their offspring. But the key here is that the male in the question is getting his mtDNA from his mother. And he will pass his mother's mtDNA to both his son and daughter (as per the rule "Mother with a mutation in her mtDNA will pass it to all her children", and here the male's mother is the source of the mtDNA in question, and he received it from her. Then, when he has children, regardless of the child's gender (son or daughter), they get his (which originally came from his mother) mtDNA).

Answer:

d. Both son and daughter