Topic 1

Question 1

3 requirements for Evolution

Answer 1

1. Variation in a trait exists within a population (More variation = more option of evolution)
2. Traits are Heritable (You can actually pass on traits
3. Not all alleles are going to be passed onto the next generation

Question 2

Allele

Answer 2

Individuals may have same gene but different alleles.
E.g Sickle cell Anemia
* Homozygous: 2 sickle cell allele; have the disease and has all affect
* Heterozygous: 1 sickle cell allele + one normal allele (more resistant to malaria)

Question 3

1. Natural Selection + Fitness of Individual =
2. Mutation + Fitness of Individual =
3. Natural Selection + Number of alleles in a population =
4. Mutation + Number of alleles in a population =

Answer 3

1. Neither. Some traits could be passed down while others die out.
2. Neither. Mutation is random
3. Down. The better offspring is passed down.
4. Up. Mutation brings in new alleles