Genetic and Gondal Sex. Differentiation Flashcards
how is sex defined
- genetic
- gonadal
- internal genitalia
- external genitalia
- hypothalamic
- physiological/behavioral
in mammals, what is the male
XY
- heterogametic
in mammals, what is the female
XX
- homogametic
in birds, what is the male
ZZ
- homogametic
in birds, what is the female
ZY
- heterogametic
what chromosome is essential for life
X
what is used for blood clotting
anti-hemolytic factors
what does the AR gene code for
androgenw
DAX-1 gene
sex determination on X chromosome for both male and female
what is the gene that causes the formation of female barr body
XIST gene
what is the SRY gene
gene on Y chromosome responsible for male sexual development
what does the SRY protein do
activates genes that cause biopotential undifferentiated gonads to differentiate testes
bipotential
ability to go either direction/either sex
undifferentiated
hasn’t picked whether male or female
what do the biopotential undifferentiated tissue become
biopotential undifferentiated gonads
- form either ovaries or testes
what do primordial germ cells give rise to
- sperm or egg (germ cells)
- colonize gondal ridge
how do PGCs differ from somatic cells
- larger
- can move in crawling motion
- motile
- secrete lytic enzymes
what is located inside the yolk sac
primordial germ cell
how do the PGCs know to migrate from yolk sac
telopheron
- chemical that signals where to go
what is the result of mitosis of the PGC cells
primitive sex cords
what do the PGCs become in females
oogonia
what do the biopotential undifferentiated gonads become
ovaries
which side foes the female repro tract develop on
left
what does the left ovary in birds produce and release
AMH
