The gene frequency for a particular trait in a population in Texas was determined to be 80% X (dominant) and 20% x (recessive allele). Twenty years later, the gene frequency was determined to be 65% X and 35% x. What does this change indicate about the gene pool?

Question

It has remained stable.
It lacks nutrition.
It is evolving.
It has become predominantly recessive.

Answer 1

It is evolving.