Chapter 17.1, Problem 4CC

Summary Introduction

To identify: The genotype of the parent purple flowered plant.

Introduction: An allele is defined as a variant of a gene responsible for coding a specific character. There are atleast two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for different phenotypic traits. These interactions can produce three types of genotypes: homozygous dominant, heterozygous and homozygous recessive. In order to identify the the genotype of the parents, a test cross is designed. In atest cross, the offspring is crossed with the homozygous recessive individual.