- sperm & egg are formed by meiosis
- gametogenesis= formation of gametes
- spermatogenesis= the formation of a sperm cell
- The sperm are developed in coiled tubes called the seminiferous tubules
- primary spermatocytes are diploid cells in the prophase of meiosis 1
- in secondary spermatocytes meiosis 1 is completed and
2 sister cells are produced. at this stage the cells still
contain a duplicated haploid number of chromosomes
when meiosis 2 is completed these are sperated and 4
sperm cells with the haploid number of single chromos
omes are formed
- spermatogenesis takes about 10 weeks
- oogenesis= formation of an ova, mature egg cell
- oogenesis begins before birth
- each follicle contains a primary oocyte, a diploid cell that is resting in prophase of meiosis 1
- oocyte completes with the help from FSH from the pituitary
- after the oocyte completes meiosis 1 it only produces 1 more cell because of uneven plasma membrane
- then when a sperm cell fertilizes the oocyte further it completes to form an ovum
- during ovulation a secondary oocyte is released (waiting for sperm to fertilize)
- LH makes the follicle rupture and this starts ovulation
- ruptured follicle turns into corpus luteum
- this makes a basic circle around the ovary which just repeats itself