Exam 1 Flashcards
(34 cards)
Cells are organized into __ and they are organized into ____
tissues, organs
How many sperm can fertilize an egg or ovum
one
the human chromosome has __ pairs
48
semen contains
5% sperm and 95% glandular excretion
infertility increases with
age
impotence is also known as
erectile dysfunction
If Y is not present the gonads develop into
ovaries
true or false: more females born than males
false
fertility drugs can cause
hyperovulation
the amniotic membrane serves to seperate
maternal and fetal blood
nondisjunction
failure of chromosomes to seperate
in monosome they is a
missing chromosome
down syndrome is linked to
maternal age
true or false: with uniparental disomy the fetus has 2 extra chromosomes
false
aneuploidy is an abnormal variation in
chromosome number
Patau syndrome is fatal with death as early as
2 months
T o F: Centromeres serve to prevent chromosomes from sticking together
false
in preimplantation diagnosis: embryos are examined at the
8 cell stage
sterile person with male phenotype
XXY
Fetal heartbeat and movement felt
second trimester
genotype for klinefelter syndrome
XXY
Earliest amniocentesis can be done at
16 weeks
average length of uterine/ menstrual cycle
28 days
Which is not a macromolecule
Glucose
