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

Lungs, what''s the role of lungs in terms of excretion? Like the trachea wh...

what''s the role of lungs in terms of excretion? Like the trachea what''s its role in excretory system?

Kingdom protists, phyla of animal like protists that have free living membe...

phyla of animal like protists that have free living members

Explain chemically defined or synthetic media-culture media, Explain Chemic...

Explain Chemically Defined or Synthetic Media - Culture Media? Synthetic media are those media where detailed composition of the medium is known in terms of the chemical nature

Explain the primary stain - ziehl-neelsen method, Explain the Primary Stain...

Explain the Primary Stain - Ziehl-Neelsen Method? Ordinary aqueous stains like methylene blue, crystal violet, etc. are not able to stain most of the species of Mycobacteria. C

What is bidirectional glenn without cardio pulmonary bypass, What is Bidire...

What is Bidirectional Glenn (BDG) without Cardio Pulmonary Bypass Surgical approach is through median sternotomy. If there is only a single superior vena cava some surgeons pre

Ultrasonic removal of gutta percha, Ultrasonic removal of Gutta percha: ...

Ultrasonic removal of Gutta percha: -the piezoelestic ultrasonic system. - As the instruments is energized; producing heat to themosoften gutta-percha. - Float gutta-perc

Hiatus hernia, Hiatus Hernia: In  this type of hernia, cardiac end of ...

Hiatus Hernia: In  this type of hernia, cardiac end of  the stomach passes through an abnormally wide oesophageal opening in the diaphragm  (see Fig. 2.6). Clinical manifestat

Measurements of the level of pollution, Measurements of the level of pollut...

Measurements of the level of pollution There are many  factor for finding  the level of pollution in the waste waters that generally find out the quantity of organic matter susp

What is mean by stability study, Stability studies are req. for the product...

Stability studies are req. for the product stable at their desire time as per specification , which give the expiry date and quality as per the manner.

Reasons for uneven distribution of power, Reasons for Uneven Distribution o...

Reasons for Uneven Distribution of Power The causes for uneven distribution of the power of regeneration among animals are not noticeably known. From a survey of the regenerat

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