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

Which is the normal sign of the electric charge, Which is the normal sign o...

Which is the normal sign of the electric charge among the two sides of the neuron plasma membrane? What is the potential difference (voltage) generated among these two sides? What

Viruses, Are viruses cellular organisms?

Are viruses cellular organisms?

What do you understand by pericardium, Q. What do you understand by Pericar...

Q. What do you understand by Pericardium? Pericardium is the covering sac of the heart. The pericardium prevents acute cardiac chamber dilatation. Acute pericarditis, pericardi

#titlenergye.., Ask queson #Minimum 100 words accepted#sources of fuel whic...

Ask queson #Minimum 100 words accepted#sources of fuel which do not depend on fossil fuel

Define equilibrium between two solid phases and a gas phase, Define Equilib...

Define Equilibrium between two solid phases and a gas phase? Consider the following reaction equilibrium: 3 CuO(s) + 2NH 3 (g) ↔ 3 Cu(s) + 3H 2 O (g) + N 2 (g) Accordin

Cow-pox (vaccinia), C o w - po x (vaccinia) E p ide...

C o w - po x (vaccinia) E p idemiology: This infection, although mostly occurring in cows, sometimes also occurs in buffaloes. Under natural conditions, t

Disposal of microorganisms, Disposal : You must always sterilize cultures ...

Disposal : You must always sterilize cultures and contaminated instruments and glassware before disposing them of or before washing-up. Usually, you can do this by autoclaving or

Explain identifying features of rhizopus - food microbiology, Explain Ident...

Explain Identifying features of Rhizopus? Macroscopically Rhizopus appears as a white cottony mass (look at rhizopus growth on media above) growing rapidly and spread over enti

Is water a non-polar or a polar molecule, Q. Is water a non-polar or a pola...

Q. Is water a non-polar or a polar molecule? What is the consequence of that characteristic for the function of water as solvent? Ans. Water is made of two atoms of hydrog

Phases of ovarian cycle, Phases of Ovarian Cycle In non-mammalian vert...

Phases of Ovarian Cycle In non-mammalian vertebrates the ovarian cycle consists of the following phase; Pre breeding phase Breeding phase and Post breedin

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