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 major divisions & representing species of gymnosperm, What are the m...

What are the major divisions and representing species of the gymnosperms? This group of plants can be separated into conifers (pine, sequoia, cypress), that have flowers called

Difference between rods and cones, Difference between rods and cones - ...

Difference between rods and cones - Rods Cones   1. More in number 1150 lakh   2. Outer seg. is cylindrical and contains

dna repair, is mismatch repair something different from proofreading

is mismatch repair something different from proofreading?

In general what is the cause of the aneuploidies, In general what is the ca...

In general what is the cause of the aneuploidies? In general the aneuploidies are caused by impaired assortment of chromosomes during meiosis. For instance, when the homologous

Amphibia, what should i write in conclusion

what should i write in conclusion

Antimicrobial prophylaxis - number of doses, Timing and number of doses ...

Timing and number of doses It has been common practice to give antibiotics at the time of anesthesia induction, which results in adequate serum and tissue levels of the drugs;

Explain human cells that produce proteins for exportation, What are some ex...

What are some examples of human cells that produce proteins for exportation? Which cytoplasmic organelle is expected to be well-developed and abundant in those cells? Specializ

Define the nutrient requirements during trauma, Define the Nutrient Require...

Define the Nutrient Requirements during Trauma? Nutritional assessment of the trauma patient is done to determine energy and protein requirements. Basal energy requirements are

What is pancreatic lipase, What is Pancreatic lipase Pancreatic lipas...

What is Pancreatic lipase Pancreatic lipase  acts on  the dietary triacylglycerols after it has been incorporated into the mixed micelle  in  the  intestinal lumen. The lipa

Explain a home-made wormery, A home-made wormery A wooden box 30 cm by ...

A home-made wormery A wooden box 30 cm by 30 cm by 15 cm fitted with a glass front is beneficial for studying the habits of earth-worms. Fill the box nearly to the top with

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