The genes controlling the early events in the development of Drosophila can be classified into three

The genes controlling the early events in the development of Drosophila can be classified into three

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
The genes controlling the early events in the development of Drosophila can be classified into three broad categories: Gap genes are a set of genes that act to define broad regions of the early embryo; these can regulate the expression and action of Pair rule genes which further define the broad regions into more numerous segments ; the pair rule genes can affect the expression and action of Segment polarity genes which will determine the fate of certain structure within each segment. As with the gradients of morphogens described above, one can envision mutations that alter the interactions between these broad classes of genes controlling the developmental fate of parts of the organism which, if established in the population, could lead to the evolution of new morphological "plans" (.g., a new Bauplan ). There is good evidence for such a supposition in another very important set of genes: the homeotic genes . Certain mutations in these genes result in homeotic mutations where one body part is transformed into the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/06/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

Ask a homework question - tutors are online