Why Arent We All The Same?

Question 1

How do neutral mutations contribute to genetic diversity? (6)

Answer 1

1. Don’t affect phenotypes
2. Outside of genetic regions
3. In introns
4. No amino acid change
5. Or it makes amino acid with same function
6. Ins sue in conservation as populations don’t change

Question 2

How does genetic disease persist? (2)

Answer 2

If it’s recessive, it has little phenotypic effect except homozygous

Each individual have different lethal mutations so it’s unlikely that parents have the same disease (kid probs won’t be homozygous)

Question 3

What is the selection equilibrium regarding mutation?

Answer 3

Selection to remove disease is initially weak as there’s only one deleterious mutation every meiosis.

Question 4

Why do mutations become common?

Answer 4

Because of an event or closed society

Question 5

What’s the paradox of genetic diversity?

Answer 5

Diversity is abundant but beneficial mutations should be passed on and remove diversity.

Question 6

What does coevolution make?

Answer 6

Continuous cycles e.g tape worm and host

Question 7

Why’s there still genetic diversity in neutrally selected traits?

Answer 7

Evolutionary lag
&
Balanced polymorphism:
-positive and negative frequency dependent selection
&
Oscillating selection

Question 8

What is frequency dependent selection?

Answer 8

Favours certain phenotypes depending on how common they are

Question 9

What is oscillating selection?

Answer 9

Selection caused by environmental changes