A population of 15 birds inhabits a fairly new island. Ten of the birds are dark brown and five of them are light brown. By chance, two of the dark brown birds and three of the light brown birds die before producing any offspring. All of the birds in the next generation are dark brown. This change in phenotypic frequency can be attributed to . quilet

Genetic drift

Explanation:

In the given question, out of ten dark-colored birds, 2 dies and out of five light-colored birds 3 dies. This produces only the dark-colored birds in the next generation but no light colored birds.

From this, we can observe that the gene pool of the small population has changed due to chance event or random event.

Since in the given situation, the small population of birds is taken into account in which the gene pool has changed due to a random event is known as the Genetic drift.

The genetic drift is the phenomenon which is associated with the shift or drift in the gene pool therefore is the answer.

"do a testcross with a homozygous recessive plant."