Repro 1 Flashcards
dimorphic
males and females have distinct physical characteristics
Sex organs consists of which 3 sets of structures?
- gonads
- internal genitalia
- external genitalia
gonads
gamete producing organs (ovaries, testes)
internal genitalia
accessory glands and ducts
external genitalia
external reproductive structures
Klinefelter’s
genetically male, w/ female characteristics (XXY)
Turner Syndrome
genetically female, w/ male characteristics (X)
In females, after development of ovaries, one X chromosome….
is turned off in each cell
bipotential stage
prior to around the seventh week of development, when reproductive structures have not begun to differentiate
If female, the gonad (cortex)…
forms ovary
If male, the gonad (cortex)…
regresses
If female, the gonad (medulla)…
regresses
If male, the gonad (medulla)
forms testis
If female, the Wolffian duct…
regresses (testosterone absent)
If male, the Wolffian duct…
forms epididymis, vas deferent, and seminal vesicle (testosterone present)
If female, the Mullerian duct…
becomes fallopian tube, uterus, cervix, and upper half of vagina (AMH absent)
If male, the Mullerian duct….
regresses (AMH present)
SRY gene
sex determining region of the Y chromosome; produces testis determining factor which guide development of gondola medulla into a testis
Testes produces what 3 hormones that influence development?
anti-mullerian hormone, testosterone, and dihydrotestosterone
anti-mullerian hormone
sertoli cells; causes mullein ducts to regress
testosterone
leydig cells; converts wolffian ducts into male accessory structures
dihydrotestosterone
leydig cells, differentiation of external genitalia
If female, genital tubercle…
forms clitoris
If male, genital tubercle forms…
glans penis
If female, urethral folds and grooves form…
labia minora, opening of vagina, and urethra
If male, urethral folds and grooves form…
shaft of penis
If female, labioscrotal swellings form..
labia majora
If male, labioscrotal swellings form..
shaft of penis and scrotum
External genitalia development driven by…
presence or absence of androgens (DHT)
