Chapter 4, Problem 9EQ

Summary Introduction

To analyze:

In some species of summer squash, two interacting genes determine the color of the fruit. a dominant allele Wdecides the white color, and colored fruit produced by a recessive allele (w). In a homozygous ww individual, the subsequent gene regulates the fruit color: G (green) is dominant to g (yellow). When cross is done between a white squash and a yellow squash, the $\text{F1}$ progenyproducedaround $50\%$ white fruit and $50\%$ green fruit.

By using the above information, question is asked to determine the genotypes of the parents. 

Introduction:

In Mendelian genetics, Dominance and Recessive are the terms used to describe the pattern of characters. It helps to define the inheritance of some traits and the ability of a gene to express.

Genotype is the genetic makeup of an organism while phenotype is the observable character or trait of an organism.

Homozygous refers to the gene carrying two alike alleles while heterozygous refers to a gene carrying two unlike alleles at same locus.

Monohybrid cross is used to verify the single character while the test cross is carried out to decide the unknown genotype of an individual.

One character can also be influenced by two different genes that are present on different locus.