Chapter 4, Problem 4EQ

Summary Introduction

To review:

The reason, due to which the two albino puppies found by two breeders, on mating, produced offspring with black hair.

Introduction:

Mendel proved that genes are present either in a dominant or a recessive manner. A dominant allele for a trait can be expressed in the individual even if, the individual is a heterozygote that is, only one copy of the gene is enough to show the phenotype in the individual. Now, it is also evident that, a single trait in eukaryotic organisms is governed by more than one genes. In these cases, all the necessary genes and their protein products are needed in order to produce a single trait.