Cleavage, Biology

CLEAVAGE -

Holoblastic & unequal. First plane is meridional. 2 blastomeres are formed. 1 megamere & another micromere.

2nd plane is also meridional but at 90° to first one.

It takes first in larger blastomere, so for short time 3 celled stage is formed followed by 4 celled stage of embryo.

Posted Date: 10/3/2012 6:10:48 AM | Location : United States







Related Discussions:- Cleavage, Assignment Help, Ask Question on Cleavage, Get Answer, Expert's Help, Cleavage Discussions

Write discussion on Cleavage
Your posts are moderated
Related Questions
Damage to the amygdalas may make a pearson fearless. Gleb Shumyatsky's lab reported in an article in Cell (2005) that knock out mice [mice lacking a specific gene] lacking the gene

Was there molecular oxygen in the earth's primitive atmosphere? How has that molecule become abundant? The presence of the molecular oxygen in the primitive atmosphere was prob

Derived Proteins These are not naturally occurring proteins and are obtained from simple proteins by the action of enzymes and chemical agents, heat, mechanical shaking, UV or

Q. How do arthropods grow? Due to the presence of exoskeleton the growth of an arthropod is periodical during the growth period the animal loses the exoskeleton, develops and g

Krebs Cycle The acetyl  group  of acetyl   co A  is now completey  degraded  stepwise  into  carbon  and hydrogen atoms  in the mitochondria  by a cyclic  sequence of  eight ma

#sperm of reptilia

1)  You want to clone the arg3 gene, which encodes an enzyme in the arginine biosynthetic pathway in Neurospora crassa.  You have available the E. coli plasmid vector shown in part

What are the phytoplankton and the zooplankton? The Phytoplankton and the zooplankton are divisions of the plankton. The phytoplankton includes the autotrophic floating beings:

Q. What is the association between sunrays and vitamin D? Vitamin D or calciferol is synthesized in the skin by the action of the ultraviolet range of sunrays upon precursor mo

Q What is the way of life of sponges? Sponges live exclusively in an aquatic environment and they are attached by their base to a substrate fixation ground. Sponges are filteri