Question

investigators at a crime scene have isolated dna from a y chromosome and have analyzed it for strs. they have a prime suspect, but he is not cooperating. however, several of his relatives are willing to help by donating dna samples. which relative will have the most similar y chromosome? his mothers brother his half-brother from his mother his fathers father his mothers grandfather his mothers father

Explanation:

The Y chromosome is passed exclusively from father to son. The suspect's Y chromosome comes from his father, who inherited it from the suspect's paternal grandfather (father's father). Other relatives (mother's side or maternal half-siblings) do not share the same paternal Y chromosome lineage, so the father's father will have the most similar Y chromosome.

Answer:

his father's father