Question

what is true about the isolated small tribal populations
A]there is a decline in population as boys marry girls only from their own tribe
B]heredity diseases like colour blindness do not spread in the isolated population

Answer 1

I think........

A]there is a decline in population as boys marry girls only from their own tribe

pls clarify though.....

Answer 2

(A) is correct here
there is a decline in population as boys marry
girls only from their own tribe