Term
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Definition
| organized packages of DNA |
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Term
| chromosome: how many in the human body? |
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Definition
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Term
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Definition
| one paternal & one maternal chromosome set |
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Term
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Definition
| 1/2 of the duplicated chromosome (2 chromatids per chromosome) |
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Term
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Definition
| holds the sister chromatids together |
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Term
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Definition
| picture of the chromosome pairs in order from longest to shortest |
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Term
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Definition
| pairing up of duplicated chromosomes via synaptonemal complex |
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Term
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Definition
| a protein structure that forms between homologous chromosomes (two pairs of sister chromatids) during meiosis and is thought to mediate chromosome pairing, synapsis, and recombination. |
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Term
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Definition
| exchange of corresponding segments of DNA molecules at the beginning of synapsis (results in chiasmatas) |
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Term
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Definition
| the point where 2 homologous non-sister chromatids exchange genetic material during chromosomal crossover during meiosis |
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Term
| 3 mechanisms contributing to genetic variation |
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Definition
independent assortment of chromosomes
crossing over of chromosomes
random fertilization |
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Term
| independent assortment of chromosomes (MECH) |
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Definition
| random orientation of homologous chromosome pairs at the metaphase plate during mitosis of meiosis 1 |
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Term
| crossing over of chromosomes (MECH) |
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Definition
| results with recombinant chromosomes. 1-3 per chromosome in human pair |
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Term
| random fertilization (MECH) |
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Definition
| any egg can be fertilized by any sperm |
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Term
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Definition
| contains 2 complete sets of chromosomes |
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Term
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Definition
| contains a single set of unpaired chromosomes |
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