Meiosis

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Why is meiosis important?
Maintains a constant number of chromosomes in adult as the number of chromosomes must be halved at some stage in the life cycle - produces genetic variation in offspring
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What happens in stage 1 of meiosis?
Chromatin condenses and nuclear envelope disappears
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Stage 2 of meiosis?
Independent segregation & crossing over (determines how chromosomes are divided in daughter cells)
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What is independent segregation?
The random arrangement of homologous pairs
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What is crossing over?
Crossing over of sections of DNA from the paternal chromosome to the maternal chromosome - produces differences in gametes
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Meiosis (1) end?
Nucleus divides - creates 2 daughter nuclei - cells separate - each cell is haploid - 4 daughter cells produced as sister chromatids separate
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Cytokinesis?
Chromatids move apart - 4 daughter cells made.
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Other cards in this set

Card 2

Front

What happens in stage 1 of meiosis?

Back

Chromatin condenses and nuclear envelope disappears

Card 3

Front

Stage 2 of meiosis?

Back

Preview of the front of card 3

Card 4

Front

What is independent segregation?

Back

Preview of the front of card 4

Card 5

Front

What is crossing over?

Back

Preview of the front of card 5
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