Child Development Quiz review

The egg is the _______ cell in the body

largest

How long can the “loser” sperm live?

1 week

Who determines the sex of the baby?

Father

Which chromosome is in charge of determining the sex of the baby?

the 23rd chromosome

When is much of a baby’s future predetermined?

at the instant of fertilization

About how long after fertilization does the egg divide?

1 day

What will the outer cells of the egg become?

the placenta

During pregnancy, a woman’s blood volume increases up to how much?

50%

Which organ is one of the first to form?

the heart

How big is the embryo after 4 weeks?

no bigger than a kidney bean

We share 98.7% of our DNA with what species?

Chimpanzee’s

At birth, the baby’s head will be ________ of his body length

a quarter

If the family history has twins are you less likely to have twins yourself?

no, it has no effect.

do all twins have separate placentas

no

after 12 weeks what trimester are you in the beginning of

the 2nd trimester

what percent of pregnancies end in a miscarriage

50%

miscarriage is common in what months of pregnancy

the first 3 months

what does the amniotic fluid contain from the mom’s food

tastes and smells

how does the baby develop the blinking reflex

through opening and closing its eyes

what color eyes do african/asian babies usually have

dark brown or dark gray

what color eyes are caucasian babies born with

blue eyes

what are the first sounds a baby hears

the rumbling of the mothers stomach

what will happen to the weight and height of the baby in the 3rd trimester

weight will triple and height will double

what major organ is one of the last to form

lungs

does the fetus have REM (rapid eye movement) sleep

yes