Factors Affecting Genetic Variation Answers

Genetic drift in a population affects the gene pool in which of the following ways?

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. What is the most likely effect of this?

A scientist has been tracking and studying a population of deer in Yellowstone National Park. He surveys the population every six months. Usually, the population is thriving and has a gene pool with a wide variety of traits. But during one six-month period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had decreased significantly. Which of the following is most likely the event that occurred to change the population?

Environmental factors can influence natural selection because they can increase or decrease

In a population of seals, most of the seals have similar coloring. However, one seal has albinism. This seal is white and is almost completely blind. What is most likely the cause of this difference from the rest of the population?

A high population of greater prairie chickens once inhabited the prairies of Illinois. The conversion of the prairies into agricultural land caused the chickens to lose their habitat. Studies have concluded that this change greatly reduced the greater prairie chicken population. The habitat loss also resulted in a decrease in the population’s genetic variation.Which change in the gene pool occurred in the greater prairie chicken population?

In a few generations, this population of beetles changed. Which is the most likely explanation for the change?

Which of the following is least likely to change the gene pool of a population of chipmunks?

Which would most likely result in an increase in genetic variation in a population?

A new pesticide has been introduced to the habitat of this population of beetles.Which describes the effect of this environmental change?