module 53

Question 1

X chromosome

Answer 1

the sex chromosome found in both males and females. Females typically have two X chromosomes; males typically have one. An X chromosome from each parent produces a female child.

Question 2

Y chromosome

Answer 2

the sex chromosome typically found only in males. When paired with an X chromosome from the mother, it produces a male child.

Question 3

Testosterone

Answer 3

the most important male sex hormone. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs during the fetal period, and the development of the male sex characteristics during puberty

Question 4

primary sex characteristics

Answer 4

the body structures (ovaries, testes, and external genitalia) that make sexual reproduction possible.

Question 5

secondary sex characteristics

Answer 5

nonreproductive sexual traits, such as female breasts and hips, male voice quality, and body hair

Question 6

spermarche [sper-MAR-key]

Answer 6

the first ejaculation

Question 7

menarche [meh-NAR-key]

Answer 7

the first menstrual period.

Question 8

intersex

Answer 8

a condition present at birth due to unusual combinations of male and female chromosomes, hormones, and anatomy; possessing biological sexual characteristics of both sexes.

Question 9

AIDS (acquired immune deficiency syndrome)

Answer 9

a life-threatening, sexually transmitted infection caused by the human immunodeficiency virus (HIV). AIDS depletes the immune system, leaving the person vulnerable to infections.

Question 10

sexual orientation

Answer 10

our enduring sexual attraction, usually toward members of our own sex (homosexual orientation) or the other sex (heterosexual orientation); variations include attraction toward both sexes (bisexual orientation)

Question 11

Steven LeVay

Answer 11

Neuroscientist that studied traits that influence sexual orientation