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Genetics

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Bettie Schuster

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Cards in this guide (9)
What is an allele

a form of a gene apex

What determines the traits of an organism

the genotype

What must happen before meiosis can begin

DNA doubles and produces sister chromatids before meiosis begins.

the chromosomes must replicate

When is cytokinesis complete

It is complete when two daughter cells are produced. Cytokinesis is the process in which the cytoplasm of a single cell divides to form two daughter cells.

If an organism has five pairs of chromosomes how many different gametes could it produce without crossing over

Ill tell you when your older

Which phase occurs directly after G1

S Phase - period of DNA replication - 10% shorter than G1.
After G1 phase S phase occurs.

What would happen if crossing over didn't happen during meiosis in humans

If crossing over didn't happen during meiosis in humans, the haploid daughter cells would all have the same genes. The crossing over creates variation and causes each daughter cell to have slightly different genes.

How are meiosis and mitosis different

mitosis only has to do with celluar reproduction

meiosis has to do with sex cells reproducing
Mitosis creates new cells that are used for development, repair, asexual reproduction and growth. Meiosis creates cells in order for organisms to reproduce sexually.

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