In rare cases some children that express recessive genetic diseases, such as cystic fibrosis, have only one parent that is heterozygous for the disease allele. If the parents are the true biological parents of the affected child, offer a genetic explanation for this observation.

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The Answer of In rare cases some children that express recessive genetic diseases, such as cystic fibrosis, have only one parent that is heterozygous for the disease allele. If the parents are the true biological parents of the affected child, offer a genetic explanation for this observation.

In Rare Cases Some Children That Express Recessive Genetic Diseases