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12 Cards in this Set
- Front
- Back
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Crossing over
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process in which homologous chromosomes exchange portions of their chromatids during meiosis
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What's meiosis?
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process of cell division that produces haploid gametes
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What's a genotype?
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the genetic information for a trait ex RR- 2 alleles
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What's a phenotype?
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physical characteristic ex. hair color
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what are the 2 types of genotypes?
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heterozygous and homozygous
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What is a heretozgous genotype?
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A genotype w/ 2 different alleles ex. Rr
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What is a homozygous genotype?
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A genotype w/ 2 of the same alleles ex. RR, rr
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what is homologous?
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refers to chromosomes that each have a corresponding chromosome from the opposite sex parent
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Define diploid
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when a cell has the total # of chromosomes ex humans 46
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define haploid
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when a cell has 1/2 the normal # of chromosomes ex human 23
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what is a tetrad?
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structure containing 4 chromatids that form during meiosis
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what is a chromatid?
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one of the 2 identical "sister" parts of a chromosome
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