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

Classification of anaemia based on etiology, Classification of Anaemias Bas...

Classification of Anaemias Based on Etiology   Anaemia  can be classified  as   Impaired Production of Red Blood Cells and Hemoglobin: This can be due to nutritional  def

What are the proportions of gametes, An organism having the genotype AaBbCc...

An organism having the genotype AaBbCcDdEe is self-fertilized. What are the proportions of gametes that are expected to carry only dominant alleles?

Prevention and cure of botulism involves, Q. Prevention and cure of botulis...

Q. Prevention and cure of botulism involves? The prevention and cure of botulism involves: 1. Strict adherence to safe food-processing practices by the food industry 2.

Regulation of senescence, Regulation of Senescence Senescence is a par...

Regulation of Senescence Senescence is a part of a developmental sequence of events and has to be a controlled process. You must have seen that if you cut twigs having leaves

The iodine test, why is it necessary to grind food before the testng?

why is it necessary to grind food before the testng?

Energy and protein deficiencies, Energy and protein deficiencies Defic...

Energy and protein deficiencies Deficiencies of protein and energy are the most common nutrient deficiencies, which adversely affect production and performance of farm animals

Comparison to healthy lungs, The nature of the sounds produced by percussio...

The nature of the sounds produced by percussion (tapping) a patient's chest can tell a physician a great deal about the condition of the organs within the thoracic cavity. Healthy,

Should human gene therapy be continued, Debate over ethics of using gene th...

Debate over ethics of using gene therapy for treating human beings started since the discovery of recombinant DNA technology. The mere fact that it involves the alteration of DNA w

Describe the positive end expiratory pressure, Describe the Positive End Ex...

Describe the Positive End Expiratory Pressure (PEEP)? A positive pressure may be applied at the end of the expiratory phase during mechanical ventilation, instead of allowing t

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