Biology
Biology
10th Edition
ISBN: 9780321794260
Author: Audesirk, Teresa/ Audesirk
Publisher: Pearson College Div
Question
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Chapter 10, Problem 6GP

a.

Summary Introduction

To determine:

The expected proportions of phenotypes in children obtained from BBMM×BbMm, BbMm×BbMm, and BbMm×bbmm.

Introduction:

The hair color in humans is regulated by two interacting genes. The pigment melanin is present in both types of hair that is brown hair as well as blond hair, however, it is present more in brown-haired people. Blond hair (b) is recessive to brown hair (B). The synthesis of melanin is coded by another gene having two alleles. The (M) allele allows the synthesis of melanin whereas the (m) allele prevents it. The genotype (mm) are albino.

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