sex determination Flashcards
what are the 3 stages of sex determination
genetic sex
gonadal sex
phenotypic sex
male genetic sex = ____ chromosomes
XY
Female genetic sex = _____ chromosomes
XX
what does SRY code for and what effect does it have on gonadal sex
testis determining factor (TDF)
differentiates gonads into testes
the absence of SRY in females has what effect
gonads differentiate into ovaries
what determines gonadal sex
presence or absence of SRY
what does the testes secrete during phenotypic sex determination
testosterone and mullierian inhibiting factor
in the absence of mulleirian inhibiting factor in females what happens
wollfian duct destruction and mullerian ducts develop
the presence of mullerian inhibiting factor has what effect on male development
Müllerian ducts degenerate and wollfan ducts develop
testosterone converts into ______________ to promote male reproductive tract and external genetalia development
dihydrotestosterone
what does testosterone do to wolffian ducts
develops them into male reproductive tract
epididymis, ducts deferens, ejaculaory duct
the absence of testosterone in females results in
external female geneitalia develops
absence of mullerian inhibiting factor results in
female reproductive tract development
uterus
