In some instances, meiosis of a primary spermatocyte with six chromosomes results in two spermatozoa that contain four chromosomes and two spermatozoa that contain two chromosomes. Predict the most likely cause.

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The condition that this question is asking about is something called aneuploidy. When a cell is "euploid," it is normal or "good." The prefix "an-" means essentially "not," "without," or "lacking;" therefore, aneuploid essentially means not good or not normal. When a cell has an extra chromosome or a missing chromosome, it is said to be aneuploid.

In humans, the correct number of chromosomes in a body cell is...

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