Inversion
MCQs on Inversion (with PYQs) Basic Concepts Gene Sequence Examples Cytology & Pairing Paracentric Inversion Effects Pericentric Inversion Effects Evolutionary […]
Paper 2 Cytology Genetics and Cytigenetics
STRUCTURAL ALTERATIONS IN CHROMOSOMES
A. Changes Involving Number of Genes i) Deletion or deficiency It signifies the loss or absence of a section of
STRUCTURAL ALTERATIONS IN CHROMOSOMES Read More »
MOLECULAR MECHANISM OF CHROMOSOMAL PAIRING
Stages of Chromosomal Pairing Chromosomal pairing proceeds through several stages: 1. Recognition and Alignment of Homologs 2. Homology Search 3.
MOLECULAR MECHANISM OF CHROMOSOMAL PAIRING Read More »
SPECIALISED TYPES OF CHROMOSOMES
A Chromosome – B-chromosomes 3-M- Chromosome 4- Mega chromosome Lampbrush chromosomes Salivary gland chromosomes Fig. Salivary gland chromosome from nucleus
SPECIALISED TYPES OF CHROMOSOMES Read More »
Banding Patterns
Introduction Fig. A standard map of the banding pattern of each chromosome in the human karyotype. G-Banding Q- Banding Fluorochrome
Karyotype Analysis
This is Two type (A) Symmetrical karyotype (B) Asymmetrical karyotyping – The karyotype of the human female contains 23 pairs
Karyotype Analysis Read More »
CHROMATIN -EUCHROMATIN AND HETEROCHROMATIN
Heterochromatin Function Types of Heterochromatin Constitutive heterochromatin Facultative heterochromatin Euchromatin Structure Appearance Function 🔹 1. Who first defined heterochromatin in
CHROMATIN -EUCHROMATIN AND HETEROCHROMATIN Read More »
NUCLEOLUS AND RIBOSOMAL RNA GENES
Nucleolus Evolution Number and Structure Structure Morphologically nucleolus consists of three regions: Fibrillar regions: Granular regions : Protein region: Chromatin
NUCLEOLUS AND RIBOSOMAL RNA GENES Read More »
MOLECULAR ORGANISATION OF CENTROMERE AND TELOMERE
MOLECULAR ORGANISATION OF CENTROMERE AND TELOMERE Centromere (i) Conserved element I (CDE I): (ii) Conserved element II (CDE II): (iii)
MOLECULAR ORGANISATION OF CENTROMERE AND TELOMERE Read More »
Nucleosome
Nucleosome Chromatin → Nucleosomal monomers Containing the spacer DNA (160 base pairs) → Core nucleosomes (140 base