Multiple choice

Healthy parents with normal height gave birth to a achondroplasia (dwarf) child. This is due to

  1. Spontaneous mutation

  2. Point mutation

  3. Induced mutation

  4. None of these
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A Correct answer
Explanation

Achondroplasia is an autosomal dominant disorder. When healthy (normal height) parents produce a child with achondroplasia, it results from a spontaneous (new) mutation in the gametes or early embryo. Point mutation is a type of mutation mechanism, while induced mutation refers to artificially caused changes.

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