Chapter 27 Flashcards
Sperm (spermatoza)
gametes in males
Ova (ovum or eggs)
gametes in females
Gametes from males and female together via
sexual intercourse (copulation)
Combination Genetic info contained within gametes via
fertilization
sperm and egg together form a ____
zygote
support development of fetus is called
gestation
birth of baby is called
parturition
Embryo is (how many months)
1-3 months
fetus is (how many months)
3-9 months
Somatic cells are
body cells (except sex cells -sperm/egg)
How do somatic cells reproduce?
via mitosis
How many chromosomes do somatic cells have?
23 pairs
46 chromosomes
How do gametes reproduce (sex cells) ?
Meiosis
How many chromosomes do gametes have?
23 chromosomes
XX chromsomes (female) how many genes in X ?
1000 genes
XY chromosomes in MALES how many genes in Y
100 genes
Which gender is more susceptible to sex linked conditions?
males
Mitosis process is used for growth _____
development and repair
gametogenesis is the
production of offspring in the gonads
gonads produce
sex hormones and gametes
How much sperm produced daily?
90 million
How long does spermatogensis take?
64- 72 days
When does spermatogensis begin?
pubery 14 years old
Sustenocytes are
“nurse cells” nourishes growing sperm so it can survive and joined by tight junctions