definitions - evolution

Question 1

define evolution

Answer 1

change over time in one or more inherited traits found in populations of organisms

Question 2

define population

Answer 2

group of organisms of the same species living together in a particular place at a particular time

Question 3

define species

Answer 3

group of individuals that; share the same characteristics, can interbreed, produce fertile offspring

Question 4

define gene pool

Answer 4

the sum of all the different alleles in a given population

Question 5

define allele frequency

Answer 5

how often each allele of a gene occurs in the gene pool for that population

Question 6

define variation

Answer 6

results from inheritance of different combinations of genes and by exposure of individuals to differing environments

Question 7

define mutation

Answer 7

change in the structure of a DNA sequence

Question 8

define mutagen

Answer 8

anything that causes a mutation

Question 9

define natural selection

Answer 9

the process where species become more adapted to their environment

Question 10

define genetic drift

Answer 10

change in allele frequency by chance

Question 11

define gene flow

Answer 11

transfer of alleles from one population to another through migration

Question 12

define speciation

Answer 12

creation of two population

Question 13

define selective agent

Answer 13

any factor that causes the death of any organisms with particular characteristics