Using the information provided in Problems 10 and 11, determine the genotype and phenotype of parents that produce the following progeny:

9/16 brown : 3/16 black : 4/16 albino

Key Concepts

Genotype

Genotype refers to the genetic constitution of an organism, specifically the alleles it possesses for a particular trait. In this context, it is essential to identify the alleles responsible for the observed phenotypic ratios in the progeny. Understanding the genotype helps predict the inheritance patterns and the potential traits of offspring based on parental combinations.

Phenotype

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both its genotype and environmental influences. In this question, the phenotypic ratios of brown, black, and albino progeny provide clues about the underlying genetic mechanisms. Analyzing these ratios allows for the inference of the parental phenotypes and their corresponding genotypes.

Punnett Square

A Punnett Square is a diagram used to predict the genetic outcomes of a cross between two organisms. It visually represents the possible combinations of alleles from each parent, helping to determine the expected genotypic and phenotypic ratios of the offspring. Utilizing a Punnett Square is crucial for solving genetic problems like the one presented, as it simplifies the analysis of inheritance patterns.