the black plague took a toll no the population back then and claimed alot of lives
Answer: They usually run tests too see. For example, that's why they made blood tests. They take you blood from you, and run tests to see if you have a disease.
Explanation: Hope it helps!
Answer: A
Explanation:
A women has two X chromosomes while men have one X and one Y chromosomes.
Each square of the punnett square will have two lowercase d's. Because the father's genes go at the top and the mother's goes on the side, or vice versa. either way, when you cross them in each square you end up with two d's in each one.