7.5 Study Guide

Question 1

Nondisjunction

Answer 1

Chromosomes do not separate during meiosis

Question 2

What happens if nondisjunction occurs?

Answer 2

homologous chromosomes fail to separate. Zygote ends with 1 or 3 chromosomes

Question 3

What genes determine sex

Answer 3

xx or xy genes

Question 4

deletion

Answer 4

missing a gene

Question 5

duplication

Answer 5

duplication of genes

Question 6

Inversion

Answer 6

genes change order (could result in normal chromosome)

Question 7

Translocation

Answer 7

genes relocate

Question 8

How many chromosomes does a normal zygote have

Answer 8

1 chromosome

Question 9

How many chromosomes does a normal gamete have?

Answer 9

2 chromosomes