Two phenotypically normal people marry. Unknown to them, they ha a common great-grandfather who suffered from a rare disorder (1 in 30,000 affected in the general population) that is inherited as an autc somal recessive trait (dd). Assume that the people marrying into thi pedigree are all DD, that there has been no earlier consanguinity, an that no affected (dd) individuals have occurred. What is the probabili that the first child of this couple (a baby girl) will be affected? Draw t

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A:

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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.