Chapter 4.2, Problem 24AQP

a.

Summary Introduction

To determine:

The genotypes, phenotypes and expected proportions of the F1 and F2 generation. When a “homozygous gray female” is crossed with a yellow male and F1 are intercrossed to produce F2 progeny.

Introduction:

Drosophila melanogaster is a species of fly, these species is known generally as the common fruit fly or vinegar fly. They have XX-XO system of sex determination, females possess two X chromosomes, whereas male possess a single X chromosome.

b.

Summary Introduction

To determine:

The genotypes, phenotypes and expected proportions of the F1 and F2 generation, when a “yellow female” is crossed with a “gray male”. The F1 are intercrossed to produce the F2   progeny.

Introduction:

Drosophila melanogaster is a species of fly, these species is known generally as the common fruit fly or vinegar fly. They have XX-XO system of sex determination, females possess two X chromosomes, whereas male possess a single X chromosome.

c.

Summary Introduction

To determine:

The genotypes, phenotypes and expected proportions of the F1 and F2 generation, when a yellow female is crossed with a gray male. The F1 females are backcrossed with gray males.

Introduction:

Drosophila melanogaster is a species of fly, these species is known generally as the common fruit fly or vinegar fly. They have XX-XO system of sex determination, females possess two X chromosomes, whereas male possess a single X chromosome.

d.

Summary Introduction

To determine:

The genotypes, phenotypes and expected proportions of the F1 and F2 generation, when F2 flies form part b mate randomly.

Introduction:

Drosophila melanogaster is a species of fly, these species is known generally as the common fruit fly or vinegar fly. They have XX-XO system of sex determination, females possess two X chromosomes, whereas male possess a single X chromosome.