Factors Affecting Genetic Variation

4.7 (19 reviews)
Environmental factors can influence natural selection because they can increase or decrease
Click the card to flip 👆
1 / 10
Terms in this set (10)
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?
Changes in the gene pool can occur due to various mechanisms. From 1892 to 1954, millions of individuals emigrated (moved out) from countries across the Atlantic Ocean to the United States. Many of these individuals entered through Ellis Island, a federal immigration station in New York. Which mechanism affected the gene pool of the immigrants that entered the United States through Ellis Island?