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Which of the following has 22 + X chromosomes in its nucleus?

Question

Which of the following has 22 + X chromosomes in its nucleus?

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Solution

To answer this question, we first need to know the value of X. In humans, a normal cell has 46 chromosomes in its nucleus. This is made up of 22 pairs of autosomal (non-sex) chromosomes and 1 pair of sex chromosomes, which can be either XX (in females) or XY (in males).

So, if X represents the number of sex chromosomes, then a cell with 22 + X chromosomes could be:

  1. A normal female cell, if X = 2 (because 22 + 2 = 24 pairs, or 48 total chromosomes)
  2. A normal male cell, if X = 1 (because 22 + 1 = 23 pairs, or 46 total chromosomes)

Without knowing the value of X, we can't definitively answer the question.

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