Question :
31.Teratogens
a.drugs and environmental factors which may harm the developing : 1995871
31.Teratogens are
a.drugs and environmental factors which may harm the developing child
b.hormones which promote sexual differentiation
c.receptors that bind with specific molecules
d.special regions on the Y chromosome which promote male development
32.The “sensitive period” of pregnancy in which the organs undergo rapid development occurs
a.during the first 24 hours after conception
b.7-10 days after conception
c.3rd – 8th weeks of pregnancy
d.Third trimester
33.Birth defects which are present at birth are known as _________.
a.teratogens
b.homolgous
c.heterolgous
d.congenital
34.In the United States, the average number of intersex births is approximately 1 in
a.100
b.500
c.2000
d.5000
35.Hermaphroditism is a rare genetic disorder, as only about ________ cases have been documented worldwide.
a.100
b.400
c.2000
d.10,000
36.Female pseudohermaphrodites have an _______ chromosome pattern.
a.XX
b.XY
c.XXY
d.X
37.Male pseudohermaphrodites have an _______ chromosome pattern.
a.XX
b.XY
c.XXY
d.X
38.A protein which binds with a specific molecule in the brain is known as a
a.hormone
b.teratogen
c.receptor
d.neurotransmitter
39.According to current protocol, the medical determination of gender assignment today is based on ___________.
a.DNA
b.hormone balances
c.sexual differentiation of the brain
d.the appearance of the genitalia
40.If a child is born with mixed genitalia, the doctor will assign the gender based on the
a.more dominant features of the external genitalia
b.the appearance of the internal genitalia
c.the overall hormone balance
d.DNA
