Multiple choice

A human egg cell with 24 chromosomes is fertilized by a sperm cell with 23. The result is:

  1. resemble the mother more than the father

  2. inherit a disorder due to the extra chromosome.

  3. resemble the father more than the mother

  4. inherit a disorder due to a missing chromosome.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A normal human zygote has 46 chromosomes, receiving 23 from each parent. If a gamete with 24 chromosomes fertilizes a normal gamete with 23, the resulting offspring will have 47 chromosomes. This extra chromosome leads to genetic disorders, such as Down syndrome.

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