Meiosis + Genetic Variation 3

Question 1

How many different types of cells are produced if there is no recombination during meiosis?

Answer 1

Two different types of cells are produced

Question 2

How many different types of cells are produced if recombination by crossing over occurs?

Answer 2

Four different types of cells are produced

Question 2

How does crossing over affect genetic variety?

Answer 2

Crossing over increases genetic variety even further

Question 3

What happens during independent segregation in meiosis I?

Answer 3

Homologous pairs line up randomly, and either chromosome of a pair can pass into each daughter cell

Question 4

What is the formula to calculate the number of possible chromosome combinations in a daughter cell after meiosis?

Answer 4

2n where n is the number of homologous pairs of chromosomes

Question 5

If an organism has 4 homologous pairs, how many different combinations of chromosomes are possible in its daughter cells?

Answer 5

16 combinations

Question 6

What is the formula to calculate the number of possible chromosome combinations in offspring?

Answer 6

(2n)2 where n is the number of homologous pairs

Question 7

How is genetic variety increased during fertilisation?

Answer 7

By the random pairing of male and female gametes from different parents

Question 8

If an organism has 4 homologous pairs, how many different combinations of chromosomes are possible in its offspring?

Answer 8

256 combinations

Question 9

How does recombination during meiosis I affect chromosome combinations?

Answer 9

It exchanges sections of chromosomes, greatly increasing the number of possible combinations in gametes