Karyotype of the egg chromosomes of the long- boddiedcellar spider, Pholcus phalangioides (Fuesslin) (Aranea : Pholcidae).

Date

3-1994

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

Mitotic cells and chromosomes of the long-bodied cellar spider. Pholcus phalangioides (Fuesslin) were observed using the lactoacetoorcein-egg squash technique. The different stages of mitosis, namely: prophase, metaphase, anaphase and telophase were identified and characterized. Mitosis in P.phalangioides was normal and regular. The most frequently encountered cells were at prophase. While the cells at telophase were least encountered. the chromosome number of P.phalangioides was 2n+22 (20 autosomes + xx(o)/xy(o)). The mean mitotic index was 57.2%. Chromosomes were monocentric and metacentric. The thin and elongated chromosomes were arranged in pairs and in decreasing lengths to form the kayogram. Relative mean length of chromosomes ranged from 0.028 to 0..65.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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