Mitochondrial DNA is only transmitted via the __________.
a. mother
b. father
c. sibling(s)
d. grandfather
Question 2
Estimates for a most recent common ancestor using Y-chromosome analyses suggest a date of __________ years ago.
a. 200,000 to 190,000
b. 180,000 to 100,000
c. 50,000 to 30,000
d. 10,000 to 7,000