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27 Cards in this Set
- Front
- Back
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Meiosis |
only occurs in reproductive organs of animals and plants. DNA is duplicated only once before meiosis 1 |
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Meiosis I |
reduction from 2n to n chromosomes (cuts number in half) |
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meiosis II |
4 Different haploid daughter cells (creates sperm, and eggs) |
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spermatogenesis |
creation of sperm through meiosis 1+2 |
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oogenesis |
creation of egg and beginning of fertilization though meiosis 1+2 |
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Meiosis 1: prophase 1 |
chromsomomes have duplicated. homologous chromosomes pair during synapsis and crossing over occurs |
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Meiosis 1: metaphase 1 |
homologous pairs align independently at the equator |
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Meiosis 1: anaphase 1 |
homologous chromosomes separate and move toward the poles. |
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meiosis 2: prophase 2 |
cells have no chromosome from each homologous pair (haploid with paired sister chromatids) |
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meiosis 2: metaphase 2 |
chromosome allign at the equator |
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meiosis 2: anaphase 2 |
sister chromatids separate and become daughter chromosomes |
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synapsis |
synapsis of homologous, no crossing over at this point |
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crossing over |
crossing over between nonsister chromatids |
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crossing over con. |
chromatids after exchange |
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Crossing over 3 |
recombinat daughter chromosomes |
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Prophase 1 |
paring of homolgous chromosomes |
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metaphase 1 |
homologous duplicated chromosomes at equator |
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anaphase 1 |
homologous chromomes separate |
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telophase 1 |
two haploid daugther cells |
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prophase |
no pairing of chromsomes |
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metaphase |
duplicated chromomes at equator |
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anaphase |
sister chromatides seperate, becoming daughter chromosomes that move to the poles |
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telophase |
two daughter cells, identical to parent cells |
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prophase 2 |
no pairing of chromosomes |
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metaphase 2 |
haploid number of duplicated chromosomes at equator |
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anaphase 2 |
sister chromatids separate, becoming daugther chromosomes that move to the poles |
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telophase 2 |
four haploid daughter cells |
