2 - Repro - Origin of the Sexes 2 Flashcards
At approx. which month of development do the testes reach the scrotum?
~ 9th month
What structure passes through the inguinal canal in females?
Round ligament of the uterus
Name the ligament which connects the ovary to the uterus:
Ovarian ligament
Name the ligament which connects the uterus to the labia majora:
Round ligament of the uterus
Name the syndrome caused by a (47, XXY) chromosome defect:
Klinefelter syndrome
If an embryo has no gonads due to a defect, would it develop male or female internal genitalia?
Female internal genitalia
- Mullerian ducts form, and Wolffian ducts regress due to lack of androgens
Is someone with Klinefelter syndrome a male or female?
Male, with small/undescended testes
Why may someone with Klinefelter syndrome have delayed/incomplete puberty?
Less than usual amount of testosterone produced
Name the syndrome caused by a (45, XO) chromosome defect:
Turner’s syndrome
Is someone with Turner’s syndrome a male or female?
Female, with no ovaries
When is Turner’s syndrome usually diagnosed? Why?
- At age when puberty usually occurs
- Girls with Turner’s syndrome do not go through puberty, due to lack of ovaries
If someone has a (46, XY) karyotype but the fetal genitalia is insensitive to testosterone and DHT, will they be born phenotypically female or male?
Female
- Have undescended testes
If someone has a (46, XX) karyotype but have excessive androgen secretion from adrenal glands, will they be born phenotypically female or male?
Male
List the reproductive hormones secreted by the hypothalamus:
- Peptide releasing factors
- GnRH
- PRH
- PIH (Dopamine)
List the reproductive hormone released by the posterior pituitary:
Oxytocin
