heartbeat - Answer beginning of gestational week 6
gonad formation - Answer gestational week 9
pre-embryonic phase - Answer to week 4
embryonic phase - Answer 5-10
Fetal phase - Answer week 11- birth
first trimester - Answer months 1-3
second trimester - Answer months 4-6
Third Trimester - Answer months 7-9 (10)
pre-term - Answer before 37 weeks
full term - Answer 40 weeks
post-term - Answer 42 weeks and beyond
Haploid - Answer one copy of each chromosome
Diploid - Answer two copies of each chromosome
synapsis - Answer Pairing of homologous chromosomes
homologous recombination - Answer crossing over
Chromosomes - Answer threadlike structures made of DNA molecules that contain the
genes
, sister chromatids - Answer Identical copies of a chromosome
homologous chromosomes - Answer Chromosomes that have the same sequence of
genes and the same structure
metaphase plate - Answer Plane midway between the two poles of the cell where
chromosomes line up during metaphase.
Gamete - Answer a mature haploid male or female germ cell that is able to unite with
another of the opposite sex in sexual reproduction to form a zygote.
Gametogenesis - Answer process by which gametes are produced through the
combination of meiosis and other maturational changes
Spermatogenesis - Answer Formation of sperm
Oogenesis - Answer formation of ovum
# of haploid chromosomes - Answer 23
# of diploid chromosomes - Answer 46
oocyte - Answer a cell in an ovary that may undergo meiotic division to form an ovum.
polar bodies - Answer cells that are not used, do not develop
spermatid - Answer an immature male sex cell formed from a spermatocyte that can
develop into a spermatozoon without further division.
spermatozoa - Answer a mature sperm cell
Gonads - Answer ovaries and testes
Testes - Answer male organ that produces sperm
seminiferous tubules - Answer Small convoluted tubules in the testes where
spermatogenesis takes place.
Ovaries - Answer Glands that produce the egg cells and hormones
fallopian tube (oviduct) - Answer female organ that connects the ovary to the uterus;
place where fertilization usually takes place
Uterus - Answer A hollow muscular organ in the pelvic cavity of the female, in which the
embryo is nourished and develops before birth
endometrium - Answer inner lining of the uterus
corpus luteum - Answer Endocrine tissue which produces hormones, estrogen, and
progesterone which prepares the uterine lining for receiving an embryo
somatic cells - Answer Any cells in the body other than reproductive cells
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