Introduction to fertilization, Biology

Assignment Help:

INTRODUCTION -

  • Fertilization is a complex process which involves fusion of male & female gametes.
  • The male gamete in animals is called as sperm & the female gamete as ovum.
  • Albert Tiler - Fertilization is a sequence of various events initiate through sperm.
  • Austin - The fusion of male & female gametes to form zygote is called as fertilization.
  • O. Hertwig - Fusion of male & female pronuclei is called as fertilization.
  • Syngamy - Fusion of gametes in the fertilization is called as syngamy.
  • Plasmagamy - Fusion of the cytoplasm of gametes.
  • Karyogamy - Fusion of nucleoplasm.
  • On the basis of shape & size gametes are two types -

                    1. Isogamy - In this male & female gametes are similar.

                    2. Anisogamy - The male & female gametes are different.

  • Genetically contribution of male & female gametes is equal.
  • According James Grey fertilization essential for -

1. Activation -

In this process cortex of egg activated & formed the fertilizine membrane over P.M.

Cytoplasm of ova initiate different metabolic activities, this activities essential for initiate cleavage.

2. Amphimixis -

In this process male & female pronuclei are fused and formed the diploid structure, i.e. zygote.

Genetic variation stimulate in the species.


Related Discussions:- Introduction to fertilization

Describe primitive anaerobic eukaryotic cells, Q. How can the hypothesis th...

Q. How can the hypothesis that asserts that chloroplasts as well as mitochondria were primitive prokaryotes that related in mutualism with primitive anaerobic eukaryotic cells be c

What do you mean by excretion, Q What is the excretion? Excretion in Ph...

Q What is the excretion? Excretion in Physiology is the procedure of elimination of metabolic wastes and other toxic substances from the body.

Acute renal failure and its etiology, Acute Renal Failure You know tha...

Acute Renal Failure You know that acute renal failure refers to the sudden deterioration in kidney function, characterised by reduced urine excretion to less than 10 ml/kg  bo

Zoology, difference between one girl and lungs two ribosomes and lysosomes ...

difference between one girl and lungs two ribosomes and lysosomes ?

The cardiac cycle during which the ventricles are filled, What is the stage...

What is the stage of the cardiac cycle during which the ventricles are filled? The filling of the ventricles with blood happens during diastole. The Circulatory System - Ima

Psilopsida, why psilopsida have rootless sporophyte

why psilopsida have rootless sporophyte

Explain prostaglandins, Prostaglandins Prostaglandins belong  to a sub...

Prostaglandins Prostaglandins belong  to a subclass of  lipids known  as the eicosanoids because of their structural similarities to  the C-20  polyunsaturated  fatty acids, t

Gene targeting in es cells, Gene targeting in ES cells: In some of the li...

Gene targeting in ES cells: In some of the livestock species pro-nuclear injection cannot be used to modify the animals' own genes due to various reasons especially non availabil

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