The probability that both their first child and second child would have achondroplasia is a P=1/4 (one quarter).
Generally, Achondroplasia is simply defined as a genetic disorder in which the formation of long bones through cartilage ossification is slowed,
In conclusion. the probability that both the first child and second child of an achondroplasia patient has achondroplasia is 1/4 or a quarter chance.
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