HiSET Science Test Prep

Category - HiSET Science Practice Test Questions

Which of the following is a result of babies born with an abnormal chromosome count?
  1. They have no chance of surviving.
  2. They tend to be more intelligent.
  3. They are the same as babies with the normal amount of chromosomes.
  4. They could have Down syndrome.
Answer: D - Babies born with an abnormal chromosome count can have Down syndrome. Down syndrome occurs when there are three copies of a certain chromosome (chromosome 21) instead of the usual two chromosomes. This is called trisomy.
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