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

Can mitosis occur in haploid cells, Can mitosis occur in haploid (n) cells?...

Can mitosis occur in haploid (n) cells? And in triploid cells? The mitotic cell division can happen in haploid (n) cells, diploid (2n) cells, triploid (3n) cells, etc. Mitosis

Explain the leydig cells, In an adult male, which of the following is true?...

In an adult male, which of the following is true? A. The plasma membranes of Leydig cells contain LH receptors. B. The plasma membranes of Sertoli cells contain FSH receptor

How do placental mammals reproduce, How do placental mammals reproduce? ...

How do placental mammals reproduce? Placental mammals reproduce sexually, they have internal fecundation and they are viviparous, i.e., their embryo creates within the mother's

Eye and ear examination of new born, Eyes Check for conjuctivitis, epi...

Eyes Check for conjuctivitis, epicanthal folds, and observe the inner canthus of both eyes. Look for squint, nystagmus, trauma, lacrimal duct obstruction, corneal opacity, c

Infective endocarditis, Infective Endocarditis :  All patients with prosth...

Infective Endocarditis :  All patients with prosthetic valve come under the high-risk category for endocarditis. They need prophylactic antibiotics if any procedure, which is like

Omni science valve-types of valves, Omni Science Valve :  Thi...

Omni Science Valve :  This is another type of tilting disc valve available from 1978. The cage is made of titanium and disc out of pyrolitic carbon. There have been a

What is pupillary reflexes, Pupillary reflexes There are two types of r...

Pupillary reflexes There are two types of reflexes which control the pupillary reaction-the light reflex and near reflex. When light is shown on one eye, there is a constrictio

Specie concept, what is nomenalistic specie concept

what is nomenalistic specie concept

Class of mollusca - aplacophora, Class of Mollusca - Aplacophora Worm...

Class of Mollusca - Aplacophora Worm-like, no shell, head or excretory organs mantle with chitinous cuticle or scales or spicules mantle cavity posterior. Aplacophorans are a

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