In some instances, meiosis of a primary spermatocyte with six chromosomes results in to spermatozoa that contains for chromosomes in to spermatozoa that contain two chromosomes. predict the most likely cause

Nondisjunction

Explanation:

Nondisjunction occurs when chromosomes do not align and separate properly prior to the formation of daughter cells, during meiosis I or II. This means that some gametes are missing some chromosomes, and other gametes have extra chromosomes.

This is usually lethal, however, some genetic disorders in humans are caused by chromosome nondisjunction. For example, Down's syndrome is caused when the original gamete has an extra copy of chromosome 21, meaning the individual contains 3 copies of chromosome 21.

The most likely cause of the given scenario with the chromosomes is:

According to the given question, we are asked to provide the most likely reason why during the meiotic stage, the spermatocyte which contains six chromosomes gives birth to a spermatozoa with only two chromosomes.

As a result of this, we can see that this scenario can best be explained with the term called nondisjunction which shows that during meiosis, chromosomes which does not align, separates and this results in the loss of some gametes which results in other gametes having extra chromosomes.

Therefore, the correct answer is nondisjunction

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