Slide 3

Question 1

Germ plasm theory

Answer 1

Inheritance only takes place via gametes

Question 2

Which scientist proved the germ plasm theory

Answer 2

Weisman - mice cut off tail

Question 3

Which hypothesis of inheritance did the germ plasm theory contradict?

Answer 3

Lamarck

Question 4

What are karyotypes

Answer 4

Individual’s list of chromosomes

Question 5

What are non-sex chromosomes called

Answer 5

Autosomes

Question 6

Number of chromosome pairs in humans

Answer 6

23

Question 7

Number of chromosome pairs in chimpanzees

Answer 7

24

Question 8

Number of chromosome pairs in drosophila

Answer 8

4

Question 9

Homozygote vs Heterozygote

Answer 9

Homozygote has same allele in each homologous chromosome

Heterozygote has different allele in each homologous chromosome

Question 10

Three processes that can change the genetic information in the gametes

Answer 10

1. Mutation
2. Independent assortment
   - metaphase 1 of meiosis
3. Recombination of parental chromosomes
   - late prophase 1 of meiosis

Question 11

When does chromosome replication occur

Answer 11

During interphase

Question 12

What happens during late prophase 1

Answer 12

Recombination

Question 13

Why did meiosis evolve?

Answer 13

Elimination of harmful mutations via recombination and independent assortment

Better adaptability to changing environmental conditions via genetic variability among offspring