Mechanism of Cleavage

Such as the mitotic division in any cell, cleavage is the result of two events: mitotic nuclear division (Karyokinesis) followed via cytoplasmic division (Cytokines).The two events include numerous metabolic processes. The egg cytoplasm consists of all the needs for these processes before the egg leaves the ovary. They are synthesized and stored in its cytoplasm throughout oogenesis as a result of the activity of maternal genes present in the oocyte. Fertilization by sperm activates the metabolic procedures in the egg cytoplasm and initiates cleavage according to the progamme already set through the maternal genes during oogenesis.

There is much more evidence to prove that cleavage is guided by the genetic information received by the egg cytoplasm from the mother during oogenesis. There is little or no transcriptional activity in the zygotic nucleus during early cleavage. Hence, the effects of paternal genes that come into the egg along with sperm nucleus are manifested only later. The regulative factors for such type of biphasic segmentation are said to lie in the egg cytoplasm itself.

Posted Date: 1/25/2013 1:29:59 AM | Location : United States

Ask an Expert

Related Discussions:- Mechanism of cleavage, Assignment Help, Ask Question on Mechanism of cleavage, Get Answer, Expert's Help, Mechanism of cleavage Discussions

Write discussion on Mechanism of cleavage
Your posts are moderated

Write your message here..

Related Questions

Pluricellular organisms are formed by serial mitosis, Q. From the zygote, p... Q. From the zygote, pluricellular organisms are formed by serial mitosis. Would this formation be possible if each cell made by mitosis had an identical life in relation to its ant

Horse diseases-equine infectious anaemia, Equine infectious anaemia Eq... Equine infectious anaemia Equine infectious anemia (EIA), an acute or chronic viral disease of the equines, shows intermittent fever, loss of weight, depression, progressive w

Explain research dietitians, Explain Research dietitians Research diet... Explain Research dietitians Research dietitians work in the field of normal or therapeutic nutrition Research dietitians seek ways to improve the nutrition of both  healthy

Why is the fish circulation classified as simple circulation, Why is the fi... Why is the fish circulation classified as a simple and complete circulation? Complete circulation is that in which there is no mixture of venous blood and arterial blood. As ci

Health education to hospitalised child, Health Education to Hospitalised C... Health Education to Hospitalised Child You have unique opportunity for teaching and reinforcing good hygienic care while the child is hospitalised. Clean hair, nails, clothin

Can you explain irradiation, Q. Can you explain Irradiation? Irradiati... Q. Can you explain Irradiation? Irradiation: It is the process of exposing food to carefully controlled amount of ionising energy to destroy and control microorga

Explain microspores mother cell in angiosperms, Explain in sequence the eve... Explain in sequence the events that lead to the development of a 3-celled pollen grain from microspores mother cell in angiosperms.

How do beings of the class reptilia classify\, Concerning the maintenance o... Concerning the maintenance of body temperature how do beings of the class Reptilia classify? Like fishes and amphibians, beings of the class Reptilia are heterothermic animals

How do they affect the processing of genetic information, Q. What are intro... Q. What are introns, and how do they affect the processing of genetic information? Introns, a feature of eukaryotic DNA, are intervening stretches of DNA lying between the exon

Define transport proteins in plasma, Define Transport Proteins in Plasma? ... Define Transport Proteins in Plasma? Transport proteins, embedded in lipid membranes, make easy the import of nutrients into cells or the release of toxic products into the sur