Study Guide 7.5

Question 1

what happens when disjunction occurs during meiosis 1

Answer 1

homologous chromosomes don’t separate

Question 2

what happens when disjunction occurs during meiosis 2

Answer 2

sister chromatids don’t separate

Question 3

deletion

Answer 3

missing genes

Question 4

duplication

Answer 4

extra genes

Question 5

inversion

Answer 5

order of genes is reversed

Question 6

translocation

Answer 6

swaps with another chromosome

Question 7

what determines sex at birth

Answer 7

x or y chromosomes

Question 8

what happens with two x chromosomes

Answer 8

one is inactivated

Question 9

what happens with three x chromosomes

Answer 9

two are inactivated