Topic 7B- Populations and Evolution

Question 1

How can a species exist?

Answer 1

As one or more populations

Question 2

Define population

Answer 2

A group of organisms of the same species occupying a particular space at a particular time that can potentially interbreed

Question 3

Define gene pool

Answer 3

All the different alleles of all the genes of all the individuals in a population at any one time

Question 4

Define allele frequency

Answer 4

The number of times an allele occurs within the gene pool in a population, relative to all others at the same locus

Question 5

What does the Hardy-Weinberg principle provide?

Answer 5

It provides a mathematical model, which predicts that allele frequencies will not change from generation to generation

Question 6

What conditions must be met for the Hardy-Weinberg principle to apply? (5)

Answer 6

1. Large population size
2. No mutations
3. No migration
4. Random mating
5. No natural selection

Question 7

Give the Hardy-Weinberg equation

Answer 7

p^2 + 2pq + q^2 = 1

Question 8

What do p and q represent in the Hardy-Weinberg equation

Answer 8

P- frequency of dominant allele
Q- frequency of recessive allel

Question 9

Give the relationship between p and q in an equation

Answer 9

p + q = 1