Calix’s karyotype showed that he has a genotype of xxy. explain how nondisjunction caused calix to be xxy. include an explanation of why this could only occur in meiosis i.

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17-12-2022
Biology

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Calix’s karyotype showed that he has a genotype of xxy. explain how nondisjunction caused calix to be xxy. include an explanation of why this could only occur in meiosis i.

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contexto1005 contexto1005 · Answer 1 · 2022-12-20T16:05:05+01:00

Calix’s karyotype showed that he has a genotype of xxy. Nondisjunction is the process in which chromosomes fail to separate during meiosis, resulting in an unequal number of chromosomes in the daughter cells. This is what caused Calix to be xxy.

Nondisjunction can occur during either meiosis I or meiosis II. During meiosis I, when homologous chromosomes pair up and exchange genetic material, one of the homologous chromosomes may fail to separate, resulting in two daughter cells with an unequal number of chromosomes. This unequal distribution is what caused Calix to be xxy.

Meiosis II is the stage where the two daughter cells from meiosis I divide again, resulting in four haploid cells. During this stage, it is not possible for nondisjunction to occur since the homologous chromosomes have already separated at the end of meiosis I. Therefore, nondisjunction can only occur in meiosis I, which is why Calix was xxy.

Learn more about meiosis I at :https://brainly.com/question/29383386

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