a population of birds lives on a small island. another population of the same species lives on the mainland…

a population of birds lives on a small island. another population of the same species lives on the mainland. the distance between the island and the mainland is too great for birds to fly back and forth. recently, a series of sandbars and tiny islands have formed between the island and the mainland.\nwhat is the most likely effect of this?\no an increase in mutations in both bird populations\no an increase in gene flow between the bird populations\no an increase in genetic drift between the bird populations\no an increase in mutations in the island population

a population of birds lives on a small island. another population of the same species lives on the mainland. the distance between the island and the mainland is too great for birds to fly back and forth. recently, a series of sandbars and tiny islands have formed between the island and the mainland.\nwhat is the most likely effect of this?\no an increase in mutations in both bird populations\no an increase in gene flow between the bird populations\no an increase in genetic drift between the bird populations\no an increase in mutations in the island population

Answer

Answer:

B. an increase in gene flow between the bird populations

Brief Explanation:

Previously, the distance was too great for birds to move between island - mainland populations. The new sandbars and tiny islands provide stepping - stones, facilitating movement and thus gene flow between the populations.