The proportion of the phenotypes in the children of the given parents for hair color: a. BBMM × BbMm b. BbMm × BbMm c. BbMm × bbmm Introduction: The color of the hair in humans is determined by the amount of melanin present in the hairs. The dark-hair color (brown) people have more amount of melanin in comparison to that present in light-hair color (blonde) ones. The allele for brown hair color (B) is dominant over that of blonde hair color (b). The synthesis of melanin depends on the presence of another gene (M), which is dominant over the one that is recessive (m). Irrespective of the presence of hair color gene for brown (B) or blonde (b), when the homozygous recessive (mm) is there, the individual is always an albino.

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Chapter 10, Problem 6GP

Summary Introduction

To analyze:

The proportion of the phenotypes in the children of the given parents for hair color:

a. BBMM × BbMm

b. BbMm × BbMm

c. BbMm × bbmm

Introduction:

The color of the hair in humans is determined by the amount of melanin present in the hairs. The dark-hair color (brown) people have more amount of melanin in comparison to that present in light-hair color (blonde) ones. The allele for brown hair color (B) is dominant over that of blonde hair color (b). The synthesis of melanin depends on the presence of another gene (M), which is dominant over the one that is recessive (m). Irrespective of the presence of hair color gene for brown (B) or blonde (b), when the homozygous recessive (mm) is there, the individual is always an albino.

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