Natural Selection/ Selective Breeding

Question 1

Why do animals have features

Answer 1

Survival

Mates (e.g. tails on a male peacock)

Question 2

Steps to natural selection

Answer 2

1. Random mutation causes variation
2. Variation gives some a survival advantage
3. They outcompete others more likely to have more offspring that are healthier and more likely to survive
4. Mutation/characteristic is passed on to offspring

Question 3

Why selective breed?

Answer 3

• increases chance of desired phenotypes

- actively decide the characteristics that you want

Question 4

Selective breeding disadvantages

Answer 4

• increasing the risk of masked alleles to cone together

- reduces variation (more prone to disease)