The Y Chromosome Quizlet - Disadvantages Of Crime Stopperscareer Search Result In evolution, before the x and y chromosomes differentiated, they used to be equivalent homologs, like an autosome. Over time, the y chromosome lost most of its genes. This collection of ordered sts's along the y chromosome have been extensively used in order to define shortest deleted regions associated with particular phenotypes and then, in identifying y. Across 95% of its length (all but its _____ tips), the y chromosome abstains from sexual recombination—the exchange of genes—with the x chromosome. The human y chromosome consists of approximately 59 million base pairs.
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