Ch. 4 Sex Determination and Sex-Linked Characteristics

Question 1

XX =

Answer 1

female

Question 2

XY =

Answer 2

male

Question 3

turner syndrome

Answer 3

XO

Question 4

klinefelter syndrome

Answer 4

XXY

Question 5

poly-X females

Answer 5

XXX

Question 6

XYY males

Answer 6

XYY

Question 7

These regions allow the X and Y chromosomes to pair in meiosis I

Answer 7

pseudoautosomal regions

Question 8

Can crossing over occur between X and Y?

Answer 8

yes, rare

Question 9

What gene determines if male physical characteristics appear?

Answer 9

SRY

Question 10

SRY gene + testes + external female characteristics

Answer 10

androgen insensitivity syndrome

Question 11

XX + internal and external male characteristics

Answer 11

XX (SRY)

Question 12

What is when you change the characteristic of the male and the female parent in the P generation?

Answer 12

reciprocal cross

Question 13

True or False: being XY means you look like a male

Answer 13

False

Question 14

True or False: having the SRY gene means you look male

Answer 14

False

Question 15

True or False: having the SRY gene and working androgen receptors means you look male

Answer 15

True

Question 16

True or False: the X and Y chromosomes are autosomal chromosomes

Answer 16

False

Question 17

True or False: sex-linked traits are located on the X or Y chromosome

Answer 17

True

Question 18

What is an inactive X chromosome?

Answer 18

barr body

Question 19

How many barr bodies are in XXXX?

Answer 19

3

Question 20

True or False: X inactivation is the same in every cell

Answer 20

False