Chapter 27.7, Problem 4QC

Summary Introduction

To review:

The number of alleles necessary for the trait to be seen in a phenotype, if the trait is autosomal dominant.

Introduction:

Genes are the segments of DNA (deoxyribonucleic acid) that code for a specific protein. The variant forms of genes are called alleles, which always occur inpairs in somatic cells. The alleles allow various combinations to form, such as homozygous allele (both code for the same trait) and heterozygous allele (both code for different traits).