Reproductive Development Flashcards
What gene found on the short arm of the Y chromosome determines the sex of an individual?
the SRY gene.
What is the function of the SRY gene?
It bines to sepecific regions of DNA and helps to control the activity of particular genes and does not turn on until after the first few weeks,
This type of kidney develops in all vertebrate embryos of classes above the cyclostomes, but is replaced by the metanephros in reptiles, birds, and mammals.
mesonephros
The kidney that develops into the permanent kidney of reptiles, birds, and mammals.
Metanephros
Under the influence of the SRY gene which duct develops into the efferent ductules, epididymis, ductus deferens, ejaculatory duct, and seminal vesicles.
the mesonephric duct or wolffian duct.
These two ducts in the pelvic region are present in undifferentiated embryos. The presence of the SRY gene will dictate which of these ducts will degrade or develop into their respective gonadal structures.
the mesonephric duct (wolffian) and the paramesonephric (mullerian) duct.
Under the influence of the SRY gene, what happens to the paramesonephric (mullerian) duct?
Mullerian inhibiting substance produced by sertoli cells (in the testicles) cause the mullerian duct to degenerate.
In the absence of the SRY gene what happens to the wolffian (mesonephric) duct?
It degenerates.
In the absence of the SRY gene what happens to the mullerian (paramesonephric) duct?
it develops into the oviducts, uterine tubes, uterus, cervix, and the upper part of the vagina.
A person is resistant to male hormones but is genetically male which causes them to have some or all the traits of a a women, but have the genetic make-up of a man. What condition does this person have?
Androgen Insensitivity Syndrome.
