Multiple choice

If a newly born baby boy had a karyotype 23 + 23 + 23 chromosomes or 23 + 24, it would be

  1. within the range of normal

  2. an irregular number of chromosomes

  3. a structural modification in the chromosomes of the boy

  4. A genetic modification in the chromosomes of the boy.
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B Correct answer
Explanation

When there are complete multiples of sets (e.g. 23 + 23 + 23), the error is known as polyploidy. When there is an addition or loss of chromosomes within a set (e.g. 23 + 22 or 23 + 24), it is known as aneuploidy. Both result in medical aberrations.

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