Question

Gene flow is the movement of genes between different populations. Which of these would NOT be a barrier to gene flow?

A) Oceans
B) Big deserts
C) Large mountain ranges
D) Natural bridges connecting islands

Answer 1

The answer is D) Natural bridges connecting islands

Step-by-step explanation:

All of these would keep different populations from coming together except natural bridges connecting islands. The bridge would allow the immigration and emigration of individuals.

Answer 2

Natural bridges connecting islands would NOT be a barrier to gene flow

Gene flow is the transfer of genetic variation between different populations. Mobility plays an important role in gene flow between different populations. Natural bridges connecting islands would not be a barrier to gene flow because with natural bridges, there would be movement of organisms. Impassable mountain ranges, big deserts, oceans or man- made barriers are examples of barriers to gene flow.