Male AND Female Reproductive Histology Flashcards
Define ploidy
the number of sets of chromosomes
Compare and contrast the oogonium and the spermatogonium
oogonia: proliferate mitotically during fetal development as 2N primordial germ cells
spermatogonia: proliferate mitotically all throughout life as basal stem cells of seminiferous tubules
both are 2N!
Compare and contrast oogenesis and spermatogenesis
spermatogenesis: production and maturation of gamete, spermatogonia to spermatozoa
oogenesis: production and maturation of gamete, oogonia to ovum
Compare and contrast oocytogenesis and spermatocytogenesis
spermatocytogenesis: part of spermatogenesis, mitotic division of spermatogonia (stem cells) to form two 2N daughter cells
oocytogenesis: part of oogenesis, specifically mitotic division of oogonia (stem cells) to form two 2N daughter cells
Which cells undergo mitotic division with formation of two 2N daughter cells in the female
and the male?
female: oogonia, during fetal development, mitosis as 2N primordial germ cells
male: spermatogonia, were primordial germ cells, continue as stem cells for spermatocytogenesis
When daughter cells in both the female and the male meiotically replicate their DNA,
resulting in a large 4N nucleus with ropy chromosomes, what do we call these cells?
primary oocyte or primary spermatocyte
What is the ploidy number of the secondary spermatocyte and the secondary oocyte?
2N
What is the ploidy number of the spermatid and the ovum?
1N
What is the ploidy number of the spermatozoon?
1N
What is the ploidy number of the two female polar bodies? When are these polar bodies
extruded (before or after ovulation)?
1st polar body: 2N
2nd polar body, after ovulation, before fertilization: 1N
Most of the females within the domestic species ovulate a 2N primary oocyte; which two
domestic species ovulate a 4N primary oocyte?
bitches and mares
