Causes Of Evolution

Question 1

What 2 requirements are needed for evolution?

Answer 1

1) Genetic variation
2) Environmental pressure

Question 2

Random mutation is defined as

Answer 2

A sudden change in DNA causing variation from original population

Question 3

Most mutations come with a price of what?

Answer 3

Death to the organism

Question 4

A variation favored by natural selection is..?

Answer 4

Adaptation

Question 5

Anything that increases survival and reproduction will add to..?

Answer 5

Evolutionary Fitness

Question 6

Evolutionary fitness depends on what?

Answer 6

Environment

Question 7

Male peacock feathers is an example of what?

Answer 7

Sexual selection

Question 8

Sexual selection means?

Answer 8

When a Female chooses a male NOT for his fitness BUT his APPEARANCE!

Question 9

Defined as a random event that causes a shift in allele frequencies and phenotypes expressed

Answer 9

Genetic drift

Question 10

This affects small population the most.

Answer 10

Genetic Drift

Question 11

2 Examples of genetic drift are?

Answer 11

Bottleneck and Founder affect

Question 12

Bottleneck means

Answer 12

A disaster that causes few of OG pop to survive so there are less phenotypes shown from OG pop.

Question 13

Ex of bottleneck

Answer 13

Squirrels and burnt forest

Question 14

Founded affect means?

Answer 14

When small portion of small pop find new island and take over and only express small percent of OG pop.

Question 15

Ex of Founder affect?

Answer 15

Birds in a new island

Question 16

When an organism from Pop B joins Pop A and causes shift in allele frequency

Answer 16

Gene flow

Question 17

Why are small population eats prey for Gene flow?

Answer 17

Because there already is a small amount so a new allele introduced will affect it more.

Think: “Butterfly dark with butterfly light. And making more whites.”