Date of Award

10-1972

Degree Type

Bachelors Essay

Degree Name

Bachelor of Science (BS)

Department

Biological Sciences

First Advisor

Robert Rasch

Second Advisor

Ellen Rasch

Abstract

Recent experiments published in the literature have questioned the importance of the appearance of chromosomal puffs during larval development in Dipterans since Sciara larvae fed the vertebrate hormone cortisone apparently show no puffs without impairment of normal development. We have used Drosophila virilis larvae to test these results because distinct morphological criteria can be used to assess the developmental age of third instar larvae and predict the appearance of a specific puff. We have found that even though ingestion of cortisone acetate by D. virilis larvae causes a marked delay in their development the chromosome puffs appear at the expected time within the developmental sequence.

Comments

A Thesis submitted to the Faculty of the Graduate School, Marquette University, in Partial Fulfillment of the Requirements for the Degree of Master of Science, Milwaukee, Wisconsin

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