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

Pumps, The pumps The blood from the operating field is sucked with t...

The pumps The blood from the operating field is sucked with the help of the cardiotomy sucker and pump, which is filtered to remove all particulate matter and then pass

Photometer-radiation instrument, Photometer Photometer (Figure shown be...

Photometer Photometer (Figure shown below) measures the intensity of light. The metallic plate A is a photocell which emits electrons from its surface when light of sufficient

Explain the features of alternaria, Explain the Features of Alternaria? ...

Explain the Features of Alternaria? 1. Alternaria colony is wooly and compact. Underside is very dark coloured. Colony colour is grayish green or black with gray edges rapidly

What are anticoagulants, Q. What are anticoagulants? What are the practical...

Q. What are anticoagulants? What are the practical applications of anticoagulants, like heparin, in Medicine? Ordinarily there are anticoagulants circulating in the plasma sinc

Define poverty and ignorance - cause of anaemia is dietary, Define Poverty ...

Define Poverty and ignorance - cause of anaemia is dietary? Low purchasing power of the communities and their consequent inability to meet the nutrient requirements, even after

Reason''s for mendel''s success, REASON'S FOR MENDEL'S SUCCESS 1.      ...

REASON'S FOR MENDEL'S SUCCESS 1.         Mendel selected only pure breeding varieties of pea ( Pisum sativum ) for his experiments. 2.         Mendel took only those traits

What are the advanced surgical procedures, What are the Advanced surgical p...

What are the Advanced surgical procedures The scope of implantology has widened to include many more clinical situations which would be hitherto contraindicated for implants du

Awareness for diabetes mellitus, Q. Awareness for diabetes mellitus? Aw...

Q. Awareness for diabetes mellitus? Awareness should be generated in the community to prevent the diabetes mellitus, since we know prevention is better then cure. Use behav

Define the term - cerebral arteriosclerosis, Define the term - cerebral art...

Define the term - cerebral arteriosclerosis An embolism can be a blood clot, a bubble of air, a deposit of oil or fat, or a small mass of cells detached from a tumor. Reduction

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