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15 Cards in this Set

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Reproductive systems of males and female embryos are identical up to...
6 weeks of age
SRY
sex determining region Y gene, becomes active around 6 weeks after fertilization; results in the production of a regulatory protein--gene activation protein
CAIS
Complete Androgen Insensitive Syndrome: SRY gene present on Y chrom., produces normal protein. body doesn't recognize testosterone due to a faulty/missing protein receptor. XY geneotype, female characteristics
estrogen
ovaries, adrenal gland, breasts

breast development, ovulation, menstration
testosterone
testes, adrenal gland

body and facial hair, muscle mass and strength
sexual dimorphism
physical differences between males and females
nondisjunction
abnormal chromosome movement during meiosis --> change in chromosomal number
Turner Syndrome
XO female infertile
Kleinfelter Syndrome
XXY male infertile
XYY Syndrome
XYY male fertile
Triple X Syndrome
XXX male fertile
Sex determination
Crocs-> temp 32*(M), 31*(50/50), 30* (F)

Bees/ants -> haploid(M), diploid(F)

Fish-> protandry (M->F) protogyny (F->M)
CAH
Congential adrenal hyperplasia-> mutation in gene that metabolizes steroid hormones, cortisol is not produces, over production of testosterone. XX, but male
cholesterol
fatty precursor in cell membrane, produces steroid hormones
Down's Syndrome
Trisomy 21; 3 copies of 21st chrom.