Errors in fertilization, Biology

Assignment Help:

ERRORS IN FERTILIZATION -

1.       Polyspermy - When more than one sperms are fused in an ovum, this condition is called polyspermy.

2.       Polygynae - During oogenesis after the meiosis polar body I and II are not seperate, in this condition one male pronuclei fused to two female pronuclei. This condition is called polygynae.

3.      Polyandry - When two male pronuclei fused with the one female pronuclei is called as polyandry, in this condition embryo is dead.

4.      Gynogenesis - When sperm contact to the ova than ova is activated but pronuclei of sperm not fused to female pronuclei.

5.      Partial fertilization - In this type of fertilization pronuclei of sperm fertilized to a blastomere.

6.    Androgenesis - During fertilization process, pronuclei of ova if inactivated, during development process pronuclei of sperm participate.


Related Discussions:- Errors in fertilization

What is etiopathology, Q. What is Etiopathology? Who is likely to devel...

Q. What is Etiopathology? Who is likely to develop gout? What are the risk factors? Let us find out. Gout is caused when there is over production of uric acid in normal purine

Define spiral cleavage in brief., Define Spiral cleavage in brief. Patt...

Define Spiral cleavage in brief. Pattern of cell division in the developing embryo where products of the cell divisions shift by rotating either counterclockwise or clockwise s

ELECTRON TRANSPORT SYSTEM AND PHOTORESPIRATION, DESCRIBE ELECTRON TRANSPORT...

DESCRIBE ELECTRON TRANSPORT SYSTEM AND PHOTORESPIRATION

Introduction to transgenic animals, Transgenic Animal Over the centurie...

Transgenic Animal Over the centuries, animals with new combinations of genes have been produced using conventional breeding methods by means of careful selection of particular

Circulatory system, Circulatio n I n  Animal Circulation is served ...

Circulatio n I n  Animal Circulation is served by a fluid as blood/ lymph that circulates through the body in a regular manner, receiving & distributing materials in the wa

What is the role of radiographic evaluation, What is the role of radiograph...

What is the role of radiographic evaluation in implant treatment? Radiographic examination is very different with implants than with teeth. Radiographs are frequently used in i

Control of air pollution, Air pollution can be controlled by two fundamenta...

Air pollution can be controlled by two fundamental ways. Preventive technique: Important measure to control air pollution Suitable fuel having low sulphur content shoul

What is population density, Q. What is population density? The Populati...

Q. What is population density? The Population density is the relation between the number of individuals of a population and the area or volume they occupy. For instance, in 200

State the term in brief -asconoid sponge, State the term in brief -Asconoid...

State the term in brief -Asconoid sponge? Of the three different sponge architectures, it is the simplest. It comrpsies a central choanocyte lined spongocoel which opens to the

Cell wall, CELL WALL Discovered by Robert Hooke , 1665 when he saw ...

CELL WALL Discovered by Robert Hooke , 1665 when he saw dead empty cork cells. Bonne r - studied the chemical nature of cell wall. The cell wall is a rigid & prote

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