D1

Question 1

Gene pool

Answer 1

All genes that occur in population

Question 2

What causes populations to change

Answer 2

Pops change as gene pool changes

Question 3

What causes allele frequency’s to change

Answer 3

Environmental conditions change

Question 4

Hardy Weinberg Principal

Answer 4

Predicts allele frequency’s in non evolving pop

States alleles won’t change if :
•pop infinity large
•no mutations
•no natural selection
•mating is random

Question 5

What happens if allele frequencies overtime’s does not equal allele frequencies predict by HW

Answer 5

Evolution

Question 6

What is genetic drift and how does if impact a population

Answer 6

Changes to alle frequency due to CHANCE

Causes a decrease in variation and allele fixation (only 1 allele exists)= All individuals would be homozygous for that allele

Strongest in small populations

Question 7

Types of genetic drift and what would the allele frequency post genetic drift reflect

Answer 7

Founder effect- few individuals leave and create new pop somewhere else

Bottleneck effect- Severe events cause drastic pop size decrease

It would reflect the survivors

Question 8

Gene flow

Answer 8

Allele moment between open populations caused by migration, high variation, low differences between pops

Question 9

Mutations

Answer 9

Beneficial mutations are rare but becomes frequent due to natural selection

Harmful recessive alleles can remain in gene pool if there is a heterozygous advantage

Question 10

Non random mating and affect of inbreeding and self fertilization

Answer 10

Sexual selection=sexual dimorphism (differing male and female appearance)

Inbreeding and SF causes high frequency of homozygous genotypes in gene pool