Chapter 10.2, Problem 1CYP

Summary Introduction

To differentiate:

Between a pedigrees showing autosomal recessive inheritance versus one shows autosomal dominant inheritance.

Introduction:

A pedigree is a chart of a family’s history with regard to a particular genetic trait. In a pedigree, males are designated by squares and females by circles. Shaded circles and squares represent individuals expressing the genetic which are often a disorder. A line between a square and a circle represents a union. A vertical line going downward leads directly to a single child. Generations are numbered down the left side, and individuals are then identified from left to right.

Pictorial representation:

Fig 1(a): Pedigree for Autosomal recessive disorder (b) Pedigree for autosomal dominant disorder.

Fig 1(a): Pedigree for Autosomal recessive disorder

Fig 1(b): Pedigree for autosomal dominant disorder.