CH12 - Meiosis
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| Crossing over (aka synapsis) in meiosis creates new gene combinations. What stage does this happen in? | Crossing over happens in Prophase I of meiosis
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| In synapsis, is DNA exchanged between chromatids of heterozygous or homologous chromosomes or both? | Crossing over involves the exchange of DNA between chromatids of paired homologous chromosomes.
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| The purpose of crossing over is what? | Genetic recombination, which creates genetic diversity in offspring.
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| A chromosome has self-replicated, resulting in sister chromatids. Are the alleles on the sister chromatids the same or different? | They are the same: the sister chromatids are exact duplicates.
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| A tetrad is a pair of self-replicated homologous chromosomes in meiosis. Are the alleles on the non-sister chromatids the same or different? | They are different. Alleles come in pairs, one on one chromosome in the homologous pair, the other on the other chromosome in the homologous pair.
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| define karyotyping | a procedure to exam the numbers and shapes of chromosomes.
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