Question

information about Pedigree analysis​

Answer 1

Answer:

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In humans, controlled crosses cannot be made, so geneticists must resort to scrutinizing family records in the hope that informative matings have been made that can be used to deduce dominance and distinguish autosomal from X-linked inheritance. The investigator traces the history of some variant phenotype back through the history of the family and draws up a family tree, or pedigree, using the standard symbols given . The clues in the pedigree have to be interpreted differently depending on whether one of the contrasting phenotypes is a rare disorder or whether both phenotypes of a pair are common morphs of a polymorphism. The genetic disorders of human beings can be dominant or recessive phenotypes and can be either autosomal or X-linked. The four categories are discussed in the following sections.

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Answer 2

Answer:

Pedigree analysis is the study of ancestral history.

Inheritance of a particular trait is represented in the family tree over generations