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 are hydrophobic molecules, What are hydrophobic molecules (or hydropho...

What are hydrophobic molecules (or hydrophobic molecular regions)? What are hydrophilic molecules? How can they be characterized in relation to their polarity? Hydrophobic mol

Explain observations seen in thyphoid, Some observations seen in this fever...

Some observations seen in this fever are: 1.  Massive loss of  lean body mass or muscle due to tissue breakdown (250-500 g muscle tissue is lost/day) leading to excessive nitro

What is insulin pump, Insulin Pump An  insulin pump is a device used fo...

Insulin Pump An  insulin pump is a device used for the administration of  insulin, also known as continuous subcutaneous insulin infusion therapy. The device includes: - the

MACRO TAXONOMY, WHAT IS CHARACTER SELECTION CRITERI

WHAT IS CHARACTER SELECTION CRITERIA

How were the classification systems of aristotle, How were the classificati...

How were the classification systems of Aristotle and Linnaeus similar?  Both systems divided all living things into two major groups, animals and plants, but Aristotle's system

Explain the principle or theory of biuret method, Explain the Principle or ...

Explain the Principle or Theory of biuret method? If a strongly alkaline solution of Biuret is heated with very dilute copper sulphate, a violet colour is obtained. The substan

Define glycogen , A glycogen molecule having entirely of glucose uni...

A glycogen molecule having entirely of glucose units, many of that are linked in long chains through α1-4 bonds.  Furthermore,  every  10  units  or  so,  the  chain  is branched

Explain the the system of the nomenclature, Explain the The system of the n...

Explain the The system of the nomenclature The system of the nomenclature and the classification of enzymes is based exclusively on the reaction that is catalyzed and does not

Tanco beans plant, what are the origin, morphology, active constituents, us...

what are the origin, morphology, active constituents, uses and market preparation of tanco beans ?

Define about ecological models, Why do ecological models commonly have limi...

Why do ecological models commonly have limited applications? The applications of ecological models are limited due to the models are normally very simple and do not accurately

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