Speciation

Question 1

2 ways for speciation to happen

Answer 1

1) occurs when a few individuals colonize a new area outside their native range
- song birds leave the coast and go to an island

2) occurs when a habitat becomes divided by geographic barriers
- ridge separates the population and isolates one

Question 2

speciation is reversible T/F

Answer 2

F; is NOT reversible

Question 3

what will speciation be shaped by

Answer 3

natural and sexual selection

Question 4

what should eliminate NS

Answer 4

variation being due only due to environment

Question 5

smallest unit that NS can change

smallest unit that NS acts on

Answer 5

changes: populations gene frequency

acts on: individuals phenotype

Question 6

what is unecessary IN HWE

Answer 6

dominant alleles are more frequent than recessive

Question 7

accurate definition of microevolution

Answer 7

• heritable changes in the genetics of a population

Question 8

type of finch

Answer 8

large ground finch

Question 9

evolution today

Answer 9

differential survival and reproduction of the most-fit phenotypes

Question 10

rosemary grant number of finches

Answer 10

10 000 individuals

Question 11

chinook salmon

Answer 11

red/white ones

Question 12

linkage map

Answer 12

A linkage map is a genetic map that shows the relative positions of genes or genetic markers on a chromosome, based on the frequency of recombination between them during meiosis.

Question 13

fake animals by Hopkins made from

Answer 13

plasticine
- burrows that mice made are considered a natural phenotype