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

Define ailing and failing, Define ailing and failing Clinically unhealt...

Define ailing and failing Clinically unhealthy implants are classified as "ailing" or "failing". It is necessary to distinguish between an ailing versus a failing implant to de

Define precaution for estimation of vitamin c in lemon juice, Define precau...

Define precaution for estimation of vitamin c in lemon juice? 1. Rinse all glassware with 3% metaphosphoric acid before you begin your practical and subsequently each time you

Shapes of viruses, Shapes of viruses Viruses occur in a wide variety o...

Shapes of viruses Viruses occur in a wide variety of shapes. Some are spherical or polyhedral . Some are helical appearing cylindrical or rod-like and other are complex. Virus

Sp and spp., what is the deference between sp. and spp.?

what is the deference between sp. and spp.?

In which phase mother exchanges substances to fetus, Exchange of oxygen, nu...

Exchange of oxygen, nutrients, carbon dioxide and waste products from mother to fetus takes place through diffusion across the: a) Chorionic villi (pron: core-e-on-ick villi)

Are the xylem and the phloem made of living cells, Are the xylem and the ph...

Are the xylem and the phloem made of living cells? The cells that constitute the xylem ducts are dead cells killed by lignin deposition. The cells of the phloem are living

Define skirt fold thickness (spt) method, Define Skirt Fold Thickness (S...

Define Skirt Fold Thickness (SPT) Method? Skin fold measurement is the most widely used field method of body composition assessment. The skin fold (SKF) is an indirect measu

Where smooth muscle may be found in human body, a) Name three parts of the ...

a) Name three parts of the body where smooth (involuntary or unstriated) muscle may be found. b) In any one of your examples, say what the smooth muscle does.

Radiolarians - protozoan, Radiolarians - Protozoan Radiolarians are en...

Radiolarians - Protozoan Radiolarians are entirely marine planktonic species with spherical bodies and radiating pseudopodia known as axopods. The spherical body is divided in

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