chapter 17 vocab

Question 1

Gene pool

Answer 1

the collection of all genes, including different variations (alleles), present within a specific population of organisms

Question 2

Allele frequency

Answer 2

the number of times an allele occurs in a gene pool

Question 3

Directional selection

Answer 3

takes place when individuals at one end of the curve have a higher fitness than individuals in the middle or at the other end.(one extreme trait)

Question 4

stabilizing selection

Answer 4

takes place when individuals near the center of the curve have higher fitness than individuals at the two other ends.(moderate trait )

Question 5

disruptive selection

Answer 5

takes place when individuals at the upper and lower end of the curve have a higher fitness. (both extreme traits)

Question 6

gene flow

Answer 6

movement of individuals, and/or the genetic material they carry

Question 7

speciation

Answer 7

the evolutionary process where a single species splits into two or more distinct species

Question 8

geographic isolation

Answer 8

two populations are separated by geographic barriers such as rivers and mountains

Question 9

behavioral isolation

Answer 9

two populations have differences in courtship rituals or other reproductive strategies that involve behavior

Question 10

temporal isolation

Answer 10

reproduction occurs at different times off the year