Unit 4- Diversity =)

Question 1

State the comparisons of genetic diversity within, or between species that have to be made to generate a classification. (4)

I made it up but answers are from spec

Answer 1

1. freq of measurable/ observable characteristics
2. base seq of DNA
3. base seq of mRNA
4. a.a. sequence of proteins encoded by DNA + mRNA

Question 2

What is meant by ‘species richness’ ? (1)

Answer 2

no. of diff species in a community

Question 3

Comparing number of genes examined that showed genetic diversity for diff species of birds.
In this investigation, what is meant by genetic diversity? (1)

Answer 3

no. of diff. alleles of each gene

Question 4

The scientists obtained DNA from otters that were alive before hunting started.
Suggest one source of this DNA. (1)

Answer 4

preserved remains

Question 5

What can you conclude about the effect of hunting on genetic diversity in otters? (2)
{graph shows smaller range in allele frequencies}

Answer 5

• hunting ↓ pop size –> few alleles left
• otters today from one/ few surviving pops
• inbreeding

Question 6

Some populations of animals that have never been hunted show very low levels of genetic diversity.
Other than hunting, suggest two reasons why populations might show very low levels of genetic diversity. (2)

Answer 6

1. pop might have been v small / genetic bottleneck
2. pop might have started w/ small no. of individuals / founder effect
3. inbreeding