There is a population of frogs living in a pond: 25 are green,25 are brown,25 are yellow with green spots,and 25 are all yellow.A drought occurred and 75% of the frogs died.The remaining frogs were green and brown.After 25 generations,the frogs still were green and brown,yellow frogs never appeared in the population again.Which of the following best explains this phenomenon?

Question

Quizplus · Accepted Answer

The bottleneck effect occurred when the drought caused 75% of the population to die. This event significantly reduced the genetic diversity of the population, and the surviving frogs were mostly green and brown. Over subsequent generations, the reduced genetic diversity made it less likely for yellow frogs to reappear in the population, leading to the absence of yellow frogs in the population today.

There Is a Population of Frogs Living in a Pond