Pituitary and Sexual Development MCQ's Flashcards
The american aligator is an example of chromosomal sex determination because it has an X and Y chromosome.
True
False
False
Gonadal sex in most mammals is determined by the expression of the SRY gene on the Y chromosome in the male and lack of SRY gene expression in the female.
True
False
True
In the mammalian female, the lack of DHT leads to formation of the clitoris and labia. This is an example of phenotypic sex.
True
False
True
Brain sex in mammals is the result of fetal sex steroid exposure.
True
False
True
A human female with a single X chromosome would have
a testis.
a normal female appearance.
larger than normal breasts.
incomplete ovarian development.
incomplete ovarian development.
Which of the following are direct effects of SRY gene expression? (select all that apply)
Development of Sertoli cells within the primary sex chords.
Maturation of Leydig cells and secretion by these cells of testosterone
Production of antimullerian hormone by Sertoli cells.
Formation of primary sex chords.
Development of Sertoli cells within the primary sex chords.
Production of antimullerian hormone by Sertoli cells.
Formation of primary sex chords.
The primordial germ cells in mammals originates in the yolk sack placenta and then migrates through the blood stream to the germinal ridge.
True
False
False
The gonad develops from the pronephros.
True
False
False
The secondary sex chord forms the seminiferous tubules under the influence of SRY while the cortical sex chords form in the absence of SRY and develop into the egg nests.
True
False
False
Descent of the testis involves which of the following? (select all that apply)
growth of the visceral organs
attachment of the gubernaculum to the inguinal ring
growth of the gubernaculum into the developing scrotum
regression of the gubernaculum
growth of the visceral organs
attachment of the gubernaculum to the inguinal ring
growth of the gubernaculum into the developing scrotum
regression of the gubernaculum
