Chapter 18, Problem 1PDQ

(a)

Summary Introduction

To determine:

The way for knowing how many genes control development in an organism like Drosophila

Introduction:

The Drosophila melanogaster is the widely used model organism in the field of genetics and developmental biology. It is also called as the fruit fly. It is suitable for laboratory studies since it carries only four chromosomes and hence creating a loss of function and gain of function of these genes is very easy. There is various reason for using this as a model organism which includes low cost, morphology is easy to identify, small in size, genetic crossing can be done, etc.

(b)

Summary Introduction

To determine:

The experimental evidence which demonstrates that molecular gradients in the egg control development.

Introduction:

The Drosophila melanogaster is the widely used model organism in the field of genetics and developmental biology. It is also called as the fruit fly. It is suitable for laboratory studies since it carries only four chromosomes and hence creating a loss of function and gain of function of these genes is very easy. There are various reason for using this as a model organism which includes low cost, morphology is easy to identify, small in size, genetic crossing can be done, etc.

(c)

Summary Introduction

To determine:

The reason by which an individual discovers that selector genes specify which adult structures will be formed by body segments.

Introduction:

The Drosophila melanogaster is the widely used model organism in the field of genetics and developmental biology. It is also called as the fruit fly. It is suitable for laboratory studies since it carries only four chromosomes and hence creating a loss of function and gain of function of these genes is very easy. There is various reason for using this as a model organism which includes low cost, morphology is easy to identify, small in size, genetic crossing can be done, etc.

(d)

Summary Introduction

To determine:

 That how an individual learns about the levels of gene regulation involved in vulval development in C. elegans

Introduction:

Caenorhabditiselegans is the widely used model for cell-cell interaction in the developmental process. It is the nematode that usually feeds bacteria for the source of energy. The size of adult C. elegans is about 1mm long which can be grown in Petri dish with bacteria. It has a less generation time usually in three days from zygote to fertile adult. It has four larval stages namely L1, L2, L3, and L4. The hatched L1 larva usually leave through the vulval opening.

(e)

Summary Introduction

To determine:

That how an individual know that eye formation in all animals is controlled by a binary switch gene

Introduction:

The Drosophila melanogaster is the widely used model organism in the field of genetics and developmental biology. It is also called as the fruit fly. It is suitable for laboratory studies since it carries only four chromosomes and hence creating a loss of function and gain of function of these genes is very easy. There is various reason for using this as a model organism which includes low cost, morphology is easy to identify, small in size, genetic crossing can be done, etc.