4. A. If two parents are both carriers of the autosomal recessive condition cystic fibrosis (CF), what percentage of their offspring would be expected to have CF? B. What is the chance that their first two children will both have CF? C. If they have two children, what is the chance that at least one child will be phenotypically normal?

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.