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Tetrad analysis can also show two other important features of crossing-over. First, in one meiocyte several crossovers can occur along a chromosome pair. Second, in any one meiocyte these multiple crossovers can involve more than two chromatids. To think about this issue, we need to look at the simplest case: double crossovers. To study double crossovers, we need three linked genes.For example,in a cross such as ABC x abc many different tetrad types are possible, but some types are useful in the present connection because they can be accounted for only by double crossovers involving more
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Chromatid interference. Each panel illustrates two crossovers on one
During crossing over, is it always the case that one sister chromatid on each homolog does not participate in the actual crossing over? - Quora
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molecular biology - Do only one or both pairs of homologous chromatids exchange genetic material during the process of crossing over? - Biology Stack Exchange
