getting to zygote Flashcards
1
Q
primordial germ are haploid or diploid?
A
diploid
2
Q
PGCs arise from ….. and migrate to the …..wall of the …… when?
A
epiblast/ posterior wall of the secondary yolk sac at the end of three weeks
3
Q
how many PGCs migrate from yolk sac to gonads? what happens to them?
A
1000 cells. they undergo rapid mitotic division to produce diploid cells.
4
Q
what happens to misdirected Germ cells if they survive?
A
they may develop into teratomas, which are bizarre growths
