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

Carbohydrates, CARBOHYDR A TES Carbohydrate = hydrate of carbo...

CARBOHYDR A TES Carbohydrate = hydrate of carbon. Hydroxyl group present. Aldehyde group or keto group may present. Carbohydrates are polyhydroxy aldehydes

How dietary constituents affecting the calcium absorption, How dietary cons...

How dietary constituents affecting the calcium absorption? Several dietary constituents have an effect on calcium absorption. The differences in fractional absorption from diff

Determine the greater palatine nerve and vessel, Greater Palatine nerve and...

Greater Palatine nerve and vessel  The greater palatine nerve runs forward in a groove on the inferior surface of the hard palate to communicate with nasopalatine nerve in inci

Green glands of crustaceans, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Define the structure of moulds, The structure of moulds When the four p...

The structure of moulds When the four pure cultures of mould have reached a vigorous state of growth study each one with a hand lens. See if you can see stalks with tiny black

Define the term - clinical neuropsychology, Clinical Neuropsychology Cl...

Clinical Neuropsychology Clinical neuropsychology is the application of neuropsychological knowledge to the assessment, management and rehabilitation of people who have suffere

Phases of cell cycle, The cell goes through many discrete phases before and...

The cell goes through many discrete phases before and after cell division. From this understanding, scientists then identified the four characteristic phases of the cell cycle:

Illustrate the methods to evaluate osseointegration, Q. Illustrate the Meth...

Q. Illustrate the Methods to evaluate osseointegration? The criteria of success in implant dentistry remains complex. The vast majority of clinical reports noting success and f

Anomalies related to oesophagus and stomach, Anomalies Related to Oesophagu...

Anomalies Related to Oesophagus and Stomach   Let us discuss briefly the anomalies of oesophagus and stomach. These are summarised as  follows: Associated Problems  1)  P

What are the important organic molecules for living being, What are the mos...

What are the most important organic molecules for living beings? There are many kinds of organic molecules that are significant for the living beings. Especially vital are amin

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