Questions: How many pairs of autosomes and how many germ cells do we have? What is the ploidy of each?

How many pairs of autosomes and how many germ cells do we have? What is the ploidy of each?
Transcript text: How many pairs of autosomes and how many germ cells do we have? What is the ploidy of each?
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Solution

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The answer is the third one: 22/Diploid, 1/Haploid.

Explanation for each option:

  1. 23/Diploid, $2 /$ Haploid: This is incorrect. Humans have 23 pairs of chromosomes, but only 22 of these are autosomes. The 23rd pair are the sex chromosomes, not autosomes. Additionally, germ cells (sperm and egg) are haploid, not diploid.

  2. 22/Haploid, 21 Diploid: This is incorrect. Humans have 22 pairs of autosomes, which are diploid, not haploid. The number 21 does not correspond to any relevant count in this context.

  3. 22/Diploid, 1/Haploid: This is correct. Humans have 22 pairs of autosomes, which are diploid (two copies of each chromosome). Germ cells (sperm and egg) are haploid, containing one set of chromosomes, which includes one sex chromosome.

  4. 22/Haploid, 1Diploid: This is incorrect. The 22 pairs of autosomes are diploid, not haploid. Germ cells are haploid, not diploid.

  5. None of the Above: This is incorrect because option three is the correct answer.

In summary, humans have 22 pairs of autosomes, which are diploid, and germ cells, which are haploid.

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