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meiosis 1
| Question | Answer |
|---|---|
| what is the best way to describe a diploid cell | 2n and contains two sets of homologous chromosomes |
| what are the two distinct divisions of meiosis | prophase 1 and prophase 2 |
| how does a tetrad form in prophase 1 of meiosis | the homologous chromosomes pair up |
| eggs | haploid gametes produced in a female |
| sperm | haploid gametes produced in a male |
| polar bodies | cells produced in females that do not participate in reproduction |
| unlike mitosis meiosis in male mammals results in the formation of | four haploid gametes |
| what assorts independently during meiosis | chromosomes |
| what happens to the chromosome number during meiosis | it halves |
| haploid | a cell that contains only a single set of genes |
| gametes | sex cells |
| diploid(2n) | a cell that contains two sets of homologous chromosomes |
| n | number of chromosomes |
| 2 | one set from your father and one set from your father |
| homologous | chromosomes in which one set comes from the male parent and one from the female parent |
| crossing over | the exchange of genes between homologous chromosomes resulting in a mixture of parental characteristics in offspring |
| synapsis | during prophase of meiosis the homologous chromosomes pair up producing a tetrad |
| what happens during prophase 1 | replicated chromosomes condense |
| what happens during metaphase 1 | the homologous chromosomes line up on the metaphase plate |
| what happens during anaphase 1 | pairs of homologous chromosomes get seperated |
| what happens during telophase 1 | the homologous chromosomes reach opposite poles of the cell each pole contains only one member of a pair of homologous chromosomes |
| what happens during prophase 2 | the spindle fibers form and the chromosomes condense a second time |
| what happens during metaphase 2 | a haploid number of chromosomes line up near the center of the cell by the spindle fibers |
| what happens during anaphase 2 | each homologous chromosome is guided by the spindle fibers toward opposite poles of the cell. the chromosome number is reduced from 2n to n |
| what happens during telophase 2 | the chromosomes reach the poles and the nuclear membrane and nuclei reform 2 cells divide into 4 new cells with the haploid number of chromosomes |
| what are the results of cytokenis | 4 cells with the haploid number of chromosomes (4 sperm or 1 egg and 3 polar bodies) are produced. each cell has a new combination of chromosomes |
Created by:
rcbutler
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