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 is the lymphatic system, What is the lymphatic system? The lymphat...

What is the lymphatic system? The lymphatic system is a network of specialized valved vessels that drain interstitial fluid (lymph). The lymphatic system is also responsible fo

What are the typical features of mammals, What are the typical features of ...

What are the typical features of mammals? The typical features of mammals are: body (more or less) covered with hair; presence of the diaphragm muscle (that divides the thorax

Disorder of platelets - purpura, Disorder of Platelets - Purpura Purpu...

Disorder of Platelets - Purpura Purpuras  are bleeding disorders characterised by petechiae  and ecchymosis which may be due to deficiency in either,  the number or quality of

Blood pressure with the phenomena of systole and diastole, Q. What is the r...

Q. What is the relation between the maximum and the minimum blood pressure with the phenomena of systole and diastole? A minimum blood pressure is the pressure on the wall of t

Disorders of gonads, DISORDER S OF THE GONADS Hypogonadism. Inadequa...

DISORDER S OF THE GONADS Hypogonadism. Inadequate gonadal function is called hypogonadism. It is due to defects in, or injury to the hypothalamus, the pituitary gland, of th

Economic development and health, Economic Development and Health The c...

Economic Development and Health The contribution of good health to improved growth and development prospects (or its opposite i.e. the contribution of poor health to reduced e

Effect of metamorphic hormones on gene expression, Effect of Metamorphic Ho...

Effect of Metamorphic Hormones on Gene Expression Effect of metamorphic hormones on gene expression in moulting and metamorphosing insects, the first report of a particular ho

Potassium ions maintain the resting potential of neuron, Q. How do the pota...

Q. How do the potassium and sodium ions maintain the resting potential of the neuron? The plasma membrane of the neuron when at rest maintains an electric potential difference

Events prior to the sperm-egg fusion, Events prior to the Sperm-Egg Fusion ...

Events prior to the Sperm-Egg Fusion In a number of organisms that have been studied, the sperm remain immotile in the testis or in the semen. The sperm become active and mot

Rate related bundle branch block, Q. Rate Related Bundle Branch Block? ...

Q. Rate Related Bundle Branch Block? The term has often implied the absence of significant coronary or myocardial pathology. It cannot be judged without taking the total clinic

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