0704-883-0675     |      dataprojectng@gmail.com

CHROMOSOMAL PATTERNS AND VARIABILITY IN THE AFRICAN GIANT RAT (Cricetomys gambianus, WATERHOUSE-1840)

  • Project Research
  • 1-5 Chapters
  • Abstract : Available
  • Table of Content: Available
  • Reference Style: APA
  • Recommended for : Student Researchers
  • NGN 5000

ABSTRACT

The studies of mammalian chromosomes have constituted an effective area of investigation to explain their relationship. The entire chromosome set of a species is known as a karyotype. Many rodent species show a tendency for extensive chromosomal variability within species and species complexes. The use of molecular methods to provide more insight into the taxonomy and phylogeny of Cricetomys was recommended. Karyotypic studies were carried out on the African Giant rat, (Cricetomys gambianus, Waterhouse-1840) with the aim of determining its chromosome number, length, centromeric indices and nomenclature. The chromosomes were prepared from the conventional bone marrow of 10 African Giant rats - five male and five female Giant rats, treated intraperitoneally with 2 ml of 0.04% colchicines for 3 hours. Chromosomes in well-spread cells were counted and measured using KaryoType computer software. Arm lengths, centromeric indices and nomenclature were determined from these measurements and were expressed in micrometre (µm). The chromosomes were classified based on the centromeric indices obtained as metacentrics, submetacentrics, acrocentrics, subacrocentrics and telocentrics. Ideograms were also constructed from the measurements. Photomicrographs of well-spread mitotic metaphase chromosomes were used to construct a standard karyotype for the species. A diploid chromosome number of 2n = 80 with an autosomal fundamental number (NFa) of 66 to 95 were obtained for the species of C. gambianus used in this study. From the constructed idiogram, there was gradual decrease in length from one chromosome pair to another. The mean chromosomal arm lengths were siginificantly (P < 0.05) higher in the males compared to those of their female counterparts. There was no significant difference in the centomeric indices. The chromosomal nomenclatures were predominantly terminal. The chromosomal numbers, lengths, autosomal fundamental numbers and nomenclatures were similar with those xviii found in Benin Republic, Senegal, Niger Republic, Cameroun and other countries. The comparative species of the Texas banner-tailed Kangaroo rat, Dipodomys spectabilis has a diploid chromosome number of 2n = 72, and an autosomal fundamental number (NFa) of 70, which was closely related to that of the Cricetomys.




FIND OTHER RELATED TOPICS


Related Project Materials

An Examination of the Relationship Between Inflation and Interest Rate Policies in Nigeria

Background of the Study
Interest rate policies are a cornerstone of monetary policy and play a vital role in controlling i...

Read more
Design and Implementation of a Quantum-Enhanced Biometric Authentication System at Nigerian Immigration Service, Abuja

Background of the Study
Biometric authentication systems have become integral to enhancing security and streamlining identi...

Read more
A comparative study of user experience design on e-commerce conversion: Evidence from a fashion retailer in Kaduna, Nigeria

Background of the study

User experience (UX) design plays a crucial role in the success of e-commerce platforms, directl...

Read more
THE IMPACT OF PRODUCTION PLANNING AND CONTROL ON PRODUCTIVITY IN NIGERIAN BOTTLING COMPANY

Abstract

The basic aim of the study is to show the impact of production planning and control on productivity in Nigeria...

Read more
EFFECTS OF JIGSAW IV COOPERATIVE LEARNING STRATEGY ON STUDENTS’ PERCEPTION, RETENTION AND PERFORMANCE IN ORGANIC CHEMISTRY

Introduction

The relevance of science to national goals, aspirations and economy dictates to a large extent, the huge co...

Read more
An Assessment of the Efficiency of Hospital Supply Chain Management: A Case Study of Hospitals in Katsina State

Background of the Study

Hospital supply chain management (SCM) involves the processes used to plan, control, and oversee the procurement,...

Read more
THE IMPACT OF MARKET SEGMENTATION ON SALES STRATEGIES

THE IMPACT OF MARKET SEGMENTATION ON SALES STRATEGIES

This study examines the impact o...

Read more
An Assessment of Sustainable Business Strategies and Profitability: A Case Study of SMEs in Gombe State

Background of the Study

Sustainable business strategies focus on balancing economic growth, environmental preservation,...

Read more
Analysis of the Role of ICT in Reducing Examination Malpractice in Secondary Schools in Ilorin West Local Government Area, Kwara State

Background of the study
Examination malpractice has been a pervasive issue in educational systems worldwide, undermining th...

Read more
THE INFLUENCE OF PARENTAL BACKGROUND ON THE EDUCATIONAL ACHIEVEMENT OF STUDENTS

BACKGROUND OF STUDY

        Over the years, the nation has been expe...

Read more
Share this page with your friends




whatsapp