Polytene and lampbrush chromosomes
WebThe two views of lampbrush chromosomes in this figure provide significant insights into their morphology. Part (a) shows the meiotic configuration under the light microscope. … Web4. Chromosomes (5 L) 4.1 Introduction to morphology and composition 4.2 Classification based on the centromeric position 4.3 Types of chromosomes (autosomes and sex chromosomes) Special type of chromosomes: Polytene chromosome - salivary gland chromosome in Drosophila, Lampbrush chromosome in amphibian oocyte 4.4
Polytene and lampbrush chromosomes
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Web2 PERIYAR UNIVERSITY – SALEM – 636 011 BRANCH – VI - M.SC. ZOOLOGY COURSE STRUCTURE UNDER CHOICE BASED CREDIT SYSTEM (For the students admitted from the year 2012-2013 onwards) WebChromosomes - Adrian T. Sumner 2008-04-30 Integrating classical knowledge of chromosome organisation with recent ... lampbrush and polytene chromosomes; chromosomes and evolution; chromosomes and disease, and artificial chromosomes. Topics are illustrated with examples from a wide variety of
http://arts.jkkn.ac.in/wp-content/uploads/2024/07/9.-msc_zoology.pdf Web[II] Polytene chromosomes: These are also giant chromosomes but relatively smaller than lampbrush chromosomes, found in the larvae of certain dipterans. Such banded chromosomes occur in the larval salivary glands, midgut epithelium, and rectum and …
WebStructure and functions of polytene and lampbrush chromosomes. Determination of Sex: chromosome mechanism, Genic balance theory, External environment and sex determination. Sex Linked Inheritance: Inheritance of X-linked gene (Colour blindness and haemophilia in man), Sex linkage in Drosophila. WebNov 18, 2024 · The cell containing polytene chromosome has a metabolic advantage as multiple copies of gene permits the high level of gene expression. Lampbrush chromosomes:– Walther Flemming discovered theses chromosomes. It appears like a lampbrush so it is called as lampbrush chromosome.
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