Salivary gland chromosomes of Drosophila lucipennis Linnaeus and Drosophila simulans Sturtevant (Diptera: Drosophilidae).

Date

3-1988

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

Two fruitfly populations sampled at Anos, Los Banos, Laguna were identified as Drosophila lucipennis Linnaeus and Drosophila simulans Sturtevant-. Their polytene chromosomes extracted from the salivary glands of the third larval instars were analyzed and compared as to their banding patterns, chromosome number, length, the number and locations of puffs and constrictions and other obvious morpho-logical features. Both Drosophila species have the same chromosome number, 2n=8. Both also possessed all the six chromosome limbs, namely: X, 2L, 2R, 3L, 3R and 4. The chromosome arms of D. lucipennis were thinner and shorter than those of D. simulans. The total number of puffs in both species was found to be the same. However, constrictions were found to be higher in D. lucipennis than in D. simulans. The number of bands in the two species was similar in some regions but locations of puffs and constrictions were entirely different. Thus, in addition to varying morphological characters, D. lucipennis and D. simulans can be differentiated in terms of their salivary gland chromosomes.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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