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In which type of nondisjunction could the two copies of a chromosome in a gamete be heterozygous?.

Sagot :

Gametes with two heterozygous copies of a chromosome may result from nondisjunction in either meiotic division.

What three types of nondisjunction are there?

Nondisjunction can take one of three different forms: failing to separate a homologous pair of chromosomes during meiosis I; failing to separate sister chromatids during meiosis II; or failing to separate sister chromatids during mitosis.

How can you tell whether nondisjunction takes place in meiosis 1 or 2?

  • Nondisjunction, which can lead to an aberrant amount of chromosome-bearing gametes, can happen during meiosis I and meiosis II.
  • The primary distinction between nondisjunction in meiosis 1 and 2 is that whereas sister chromatids fail to separate in meiosis II, homologous chromosomes fail to separate during meiosis 1.

What are mitotic and meiotic divisions?

  • Mitosis and meiosis are the two distinct processes of cell division.
  • When people talk about "cell division," they typically mean mitosis, which is the process of creating new cells for the body.
  • The cell division process known as meiosis is what produces egg and sperm cells. A vital process for life is mitosis.

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