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MEIOSIS - PowerPoint PPT Presentation


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MEIOSIS. Vocabulary. 1. Meiosis – formation of gametes 2. Gametes – reproductive cells female – egg male – sperm (animals) - pollen (plants) 3. Diploid – full set of chromosomes - body cells are diploid (2n) - human diploid number is 46

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vocabulary
Vocabulary

1. Meiosis – formation of gametes

2. Gametes – reproductive cells

female – egg

male – sperm (animals)

- pollen (plants)

3. Diploid – full set of chromosomes

- body cells are diploid (2n)

- human diploid number is 46

4. Haploid – half the normal chromosome number

- gametes are haploid

- human haploid number is 23 (n)

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5. Fertilization – egg and sperm unite

6. Zygote – fertilized egg,

first diploid cell of new individual

7. Sex chromosome – X or Y

male XY

female XX

8. Autosome – any chromosome other than the sex chromosomes, humans have 44 autosomes

9. Homologous chromosomes – chromosomes which carry genes for the same traits

- one came from mom, the other from dad

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10. Synapsis – pairing of homologous chromosomes - occurs during Prophase1 of meiosis

- forms a tetrad

11. Tetrad – pair of homologous chromosomes

to remember the difference between mitosis and meiosis
To remember the difference between mitosis and meiosis:

Mitosis in my toes

Meiosis in my ovaries