Reproductive Anatomy 2
- Created by: Sophieparkinson19
- Created on: 04-01-21 12:58
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- Basic Human Reproduction Anatomy
- Menopause
- 45-55
- Production of hormones including FSH and LH all rise sharply
- Circulating progesterone and oestrogen decline
- Menstruation and ovulation cease
- Perimenopause
- Before menopause- irregular cycles
- Andropause
- 50-60
- Gradually over a long period of time
- Testosterone levels decrease, circulating FSH and LH increase
- Meiosis
- Cell division- process by which gametes are produced
- Two stages: Meiosis I and Meiosis II
- DNA is duplicated in S phase of interphase before meiosis starts
- Results in 4 haploid cells (only one set of chromosomes)
- Crossing Over
- Exchange of genetic material between non-sister chromatids of homologous chromosomes
- Formation of the synaptonemal complex
- Recombination nodule- contains enzymes for cutting and splicing DNA
- Menopause
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