Chapter 5

Question 1

Heteromorphic Chromosomes

Answer 1

characterize one sex or the other

Question 2

Klinefelter Syndrome

Answer 2

individuals have 47 chromosomes (XXY), rudimentary testes

Question 3

Turner syndrome

Answer 3

individuals have 45 chromosomes with only an X chromosome

Question 4

Triplo-XXX

Answer 4

three X chromosomes along with normal set of autosomes

Question 5

Pseudoautosomal Regions (PARs)

Answer 5

present on both ends of Y chromosome

Question 6

MSY

Answer 6

male specific region of Y, 95% of chromosome that doesn’t recombine with X

Question 7

SRY

Answer 7

sex-determining region of Y, controls sexual development

Question 8

Primary Sex Ratio

Answer 8

reflects proportion of males to females conceived in population

Question 9

Secondary Sex Ratio

Answer 9

reflects proportion of each sex born

Question 10

Dosage Compensation

Answer 10

females have potential to produce twice as much product for X-linked gene

Question 11

Genetic Balance Theory

Answer 11

threshold of maleness is reached when X:A ratio is 1:2

Question 12

Temperature-Dependent Sex Determination

Answer 12

environment has profound influence on sex determination