LIFE SCIENCE

Detailed explanation-1: -A pedigree, as related to genetics, is a chart that diagrams the inheritance of a trait or health condition through generations of a family.

Detailed explanation-2: -In this family pedigree, black squares indicate the presence of a particular trait in a male, and white squares represent males without the trait. White circles are females. A trait in one generation can be inherited, but not outwardly apparent before two more generations (compare black squares).

Detailed explanation-3: -Pedigrees can illustrate these patterns by following the history of specific characteristics, or phenotypes, as they appear in a family. For example, the pedigree in Figure 1 shows a family in which a grandmother (generation I) has passed down a characteristic (shown in solid red) through the family tree.