Lampbrush chromosomes, Biology

Assignment Help:

LAMPBRUSH CHROMOSOMES

  1. Discovered by Ruckert.
  2. Lampbrush Chromosomes were seen in Oocytes of several different animals like shark, amphibians, reptiles and birds. (Most distinct in Diplotene stage).
  3. Giant size of these Chromosomes is due to increase in size of Chromonema (not due to number). Chromonema grows in size to form lateral loops.
  4. Synthesis of m-RNA occurs on lateral loops.
  5. Lampbrush    Chromosomes    concerned    with vitellogenesis. (Yolk formation)

572_lampbrush chromosomes.png


Related Discussions:- Lampbrush chromosomes

What is classic blalock-taussig bt shunt in shunt operations, What is Class...

What is Classic Blalock-Taussig BT Shunt in Shunt Operations ? Subclavian artery, which arises from innominate artery, is anastomosed to pulmonary artery. In a patient with lef

What function present in placental mammalian embryos, Q. Which is the extra...

Q. Which is the extraembryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos? The allantois is the

Define protein-energy malnutrition - nutritional deficiency, Define Protein...

Define Protein-Energy malnutrition - Nutritional Deficiency? Even in normal times, PEM is a problem in many developing countries, most commonly affecting children between

Of which type of defense cell do viral infections, Of which type of defense...

Of which type of defense cell do viral infections stimulate the multiplication? The major leukocytes that generally multiply and participate in the defense against viral infect

Nucleic acids, Nucleic Acids Friedrich Miescher  (1868) discovered the ...

Nucleic Acids Friedrich Miescher  (1868) discovered the presence  of these compound  in protoplasm ,but Altman (1889) introduced the term Nucleic acid. These  acids are the lar

Percentage ratio of ash in honey, Q. Percentage ratio of ash in honey? ...

Q. Percentage ratio of ash in honey? Standards allow ash content in honey up to 0.5 per cent, but the ash of genuine honey seldom exceeds 0.35 per cent. It is determined by cha

Simple proteins, SIMPL E PROTEINS The proteins are made of amino acids...

SIMPL E PROTEINS The proteins are made of amino acids only. Additional chemicals are absent. These are of two types -    (i) Fibrous        (ii) Globular ( i )

Hazard analysis, Hazard Analysis Two steps recognized as preliminary a...

Hazard Analysis Two steps recognized as preliminary and detailed analysis of hazard are taken. Preliminary Hazard Analysis (PHA) serves two aims: (i) It can expedite bringi

What do you mean by a dihybrid cross, A dihybrid cross: Determines the gene...

A dihybrid cross: Determines the genetic makeup of an organism always involves homozygous alleles. Always involves organisms that are heterozygous at all loci. Always involves alle

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd