Genetic Basis For Evolution of Sex

By Thangjam Ranjita Devi

Evolutionary innovations have shaped the diversity of animal and plant forms.

The origin of these evolutionary innovations implies the origin of new regulatory

pathways, which leads to a change in the development pattern. Most evolutionary

innovations as shown by research in a variety of models have suggested that

they are caused not by the appearance of new genes, but rather by the

acquisition of new function by pre-existing genes. Understanding the genetic and

molecular changes which lead to a shift in the developmental pattern leading to

the regulation of the particular trait is therefore one of the key challenges of

evolutionary developmental genetics. Sex comb in Drosophila is a sexually

dimorphic morphological character, which serve as a good model system to

understand how genetic modifications have taken place in the course of evolution

leading to as an evolutionary innovation. Though genetic network controlling the

development of this trait has been studied to some extent in D. melanogaster,

and Sophophoran group, understanding of the changes that have lead to the

origin of this new character from the primitive bristles remain to be dissected out.

In this context the question asked in the present project is "What are the changes

in the developmental genetic pathway underlying the evolution of the primitive

bristles pattern of Drosophila in general to sex comb as in the Sophophoran

group". Studies in the present project explore the differences in the genetic

regulators viz, Sex combs reduced, dachshund and bric-a- brac from the species

cluster with primitive bristle to species with sex comb of Drosophila.

• Format: Paperback
• Language: English
• ISBN: 0317532499
• ISBN13: 9780317532494
• Release Date: December 2022
• Publisher: Independent Author
• Length: 176 Pages
• Weight: 0.54 lbs.
• Dimensions: 0.4" x 6.0" x 9.0"