Meiosis

Meiosis vocab from biology
STUDY
PLAY

Terms in this set (...)

gametes
male and female sex cells
fertilization
male gamete unites with female game
zygote
fertilized cell that will develop into an embryo
diploid
a cell with two of each kind of chromosome (2n)
haploid
a cell containing one of each kind of chromosome (n)
homologous chromosome
two chromosome of each pair of diploid cell
meiosis
cell division which produces gametes containing half the number of chromosome as the parent's body cells
sperm
male gamete
egg
female gamete
crossing over
when chromatids of tetrad pair tightly enough that they actually exchange genetic information
genetic recombination
the re assortment of chromosomes and genetic information through the independent assortment and segregation of homologous chromosomes
nondisjunction
failure of homologous chromosomes to separate correctly during meiosis
polyploidy
more than one set of chromosomes 3n, 4n, 5n, etc
scrotum
location of testes
testes
where sperm production occurs in male
epiddymis
coiled tubes of the tests where sperm complete maturation
vas deferns
duct that transports sperm from epididymis to the urethra
seminal vesicles
pair of glads located at base of urinary bladder
prostate glad
lines below urinary bladder surrounds the urethra secretes alkaline fluid that help sperm move and survive
bulbourethral glads
located beneath the prostate secretes fluid to neturalize the acidic enviroment of the urethra
semen
combination of sperm and fluids
puberty
time where secondary sex characteristics start to develop
LH
luteinizing hormone which was produced by pituitary gland in males it cause testes to produce testosterone and in females it cause ovulation and keeps corpus leteum
FSH
follicle stimulating hormone in males causes production of sperm in females develops a follicle to mature an ovum
follicle
group of epithelial cells that surround a developing egg cell
estrogen
steroid hormone responsible for secondary sex characteristic in females
oogenesis
production of egg cell through specialized meiosis in the ovary of females
spermatogensis
production of sperm cells through specialized meiosis in the testes of males
primary oocyte
cell that begins meiosis (oogenesis)
primary sprmatocyte
cell that begins spermatogenesis
secondary oocyte
result of Meiosis I
secondary spermatocyte
result of Meiosis I
spermatid
cells that will mature into sperm cells
ovulation
release of secondary oocyte from the ovary
Menstrual Cycle
series of changes in the female reproductive system in preparation of production of egg and preparation of uterus for implantation of a zygote
corpus luteum
the left over follicle once ovulation has occurred
implantation
(embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals
trimesters
Three equal time periods into which prenatal development is sometimes divided, each of which lasts three months
umbilical cord
ropelike structure that attaches the embryo to the wall of uterus
chorion
is the outer membrane that surrounds the amniotic sac and the embryo
chorionic villi
12 days after fertilization fingerlike projects of the chorion that grow into the uterine wall
placenta
blood vessels from the mother's uterine wall lie close to the blood vessels of the chorionic villi
progesterone
hormone secreted by corpus luteum and estrogen levels high sometimes called the pregnancy hormone
human chorionic gonadotropin (hCG_
keeps the corpus luteum alive and continues to secrete progesterone
cervix
structure that closes off the uterus to the vagina during pregnancy
uterus
muscular organ that will house the developing embryo to fetus
vagina
birth canal
ovidut
ducts where the ovum passes and possible fertilization
labor
physiological and physical changes female goes through to give birth
oxtocin
hormone released to cause labor and birth