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Biology 10
Chapter 9
| Term | Definition |
|---|---|
| meiosis | 2 functions: reduce chromosome number shuffle chromosomes in the cell to produce genetically different gametes |
| meiosis | 23 pairs or 46 total chromosomes=diploid (2n) Haploid number (n) in gametes---23 total chromosomes |
| meiosis | 22 pairs of autosomes |
| meiosis | Both males & females have 23 pairs of chromosomes |
| meiosis | 1 pair of sex chromosomes : XX female or XY male |
| meiosis | homologous pairs may contain different versions |
| meiosis | alleles ----alternate form of a gene |
| homologous chromosomes | members of a pair of chromosomes have the same size, shape, construction contain the same genes for the same traits |
| crossing over during prophase I, homologous chromosomes pair up and form a tetrad, a process called synapsis | each tetrad conists of 2 chromosomes, w/each chromosome containing 2 chromatids = total of 4 chromatids |
Created by:
Rachelnck