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BIOL211

CH12 - Meiosis

QuestionAnswer
Crossing over (aka synapsis) in meiosis creates new gene combinations. What stage does this happen in? Crossing over happens in Prophase I of meiosis
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.
The purpose of crossing over is what? Genetic recombination, which creates genetic diversity in offspring.
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.
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.
define karyotyping a procedure to exam the numbers and shapes of chromosomes.
Created by: biobu
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