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HOW REPRODUCTIVE CELLS ARE PRODUCED

FUNCTION OF MEIOSIS

- Reproduction involved union of two cells to form a zygote.
- Contains chromosomes from both parents.

Meiosis: Special type of cell division of cell division that occurs only in reproductive organs.

- Produces reproductive cells called gametes.
- Gametes (sperm or egg) are haploids (contain only one copy of each type of chromosome that diploid parent cell contains).
· Haploid – 23 chromosomes
· Diploid – 46 chromosomes (23 pairs)
- First part of meiosis reduces chromosome number from diploid to haploid (called reduction division).
- Each human sperm or egg cell contains 22 autosomes and one sex chromosome (either X or Y chromosome).
- Autosomes are chromosomes that are not directly involved in determining the sec of an individual.
· Females – XX
· Males – XY

PHASES OF MEIOSIS

- Involves sequence of phases that is similar to mitosis: prophase, metaphase, anaphase, telophase.
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Posted by: Ryan Wilkins

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