No, if a person exercise a lot and build up big muscles, his children will not be born with bigger muscles.
The statement is false.
Heredity also known as inheritance is passing down the traits to the next generation.
Building big muscles is not a heritable character, so it does not pass down to the next generation.
Heritable characters are controlled by genes. Only biological characters or genotypic characters are pass down to the next generation. Such as eye color, genetic diseases, baldness etc.
Thus, the given statement is incorrect.
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