The karyotype of one species of primate has 48 chromosomes.In a particular female,cell division malfunctions,and she produces one of her eggs with an extra chromosome (25).The most probable source of this error would be a mistake in which of the following processes?

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The most probable source of the error leading to an egg with an extra chromosome is a mistake during either anaphase I or II of meiosis. This is because these phases involve the separation of homologous chromosomes (anaphase I) or sister chromatids (anaphase II), and errors here can lead to nondisjunction, where chromosomes do not separate properly, resulting in gametes with an abnormal number of chromosomes.

The Karyotype of One Species of Primate Has 48 Chromosomes