Talk:2010 BGD Practical 3 - Gametogenesis

Original page - http://embryology.med.unsw.edu.au/Medicine/BGDlabfertilization2.htm

Female Oogenesis

Meiosis initiated once in a finite population of cells

1 gamete produced / meiosis

Completion of meiosis delayed for months or years

Meiosis arrested at 1st meiotic prophase and reinitiated in a smaller population of cells

Differentiation of gamete occurs while diploid (in first meiotic prophase)

All chromosomes exhibit equivalent transcription and recombination during meiotic prophase

Male Spermatogenesis

Meiosis initiated continuously in a mitotically dividing stem cell population

4 gametes produced / meiosis

Meiosis completed in days or weeks

Meiosis and differentiation proceed continuously without cell cycle arrest

Differentiation of gamete occurs while haploid (after meiosis ends)

Sex chromosomes excluded from recombination and transcription during first meiotic prophase

References

NCBI Bookshelf - Endocrinology: An Integrated Approach. Nussey, S.S. and Whitehead, S.A. Oxford, UK: BIOS Scientific Publishers, Ltd; 2001. The ovary - folliculogenesis and oogenesis | Spermatogenesis

Mitosis and Meiosis: MBoC Fig 20-6

Oogenesis: MBoC ch20f16.gif

Spermatogenesis: Dev Biol Ch19f18.jpg

Seminiferous Tubule: Dev Biol ch19f17.jpg