Types of parthenogenesis, Biology

Assignment Help:

TYPES OF PARTHENOGENESIS -

1.      NATURAL PARTHENOGENESIS -

In many animals natural parthenogenesis is common process & is a method of reproduction.

It is of two types -

(i) Arrhenotoky or haploid parthenogenesis -

  1. In this parthenogenesis the haploid egg develops parthenogenetically to form haploid parthenote.
  2. eg. Honey bees, Ants, Gall fly, Wasp & Arachnida.
  3. In honey bees haploid egg parthenogenetically developed to form male & the fertilize diploid egg forms female.

(ii) Thelytoky or Diploid parthenogenesis -

  1. In this diploid eggs developed parthenogenetically to form diploid parthenote.
  2. Diploid generation is always female.
  3. In this meiosis not take place during gametogenesis.
  4. eg. Aphids, Daphnia, Nematods, Rotifers, Trematodes etc.

2.       ARTIFICIAL PARTHENOGENESIS -

  1. Artificial parthenogenesis can be induced by shaking, puncture, chemicals (KCl, CO , weak acid, weak base), changes in temperature & changes in osmotic pressure.
  2. Loeb studied in frog parthenogenetically ova to sexual maturity.
  3. In Lacerta Sexicola lizard eggs are diploid and develop into female. The male are absent.

1766_types of parthenogenesis.png


Related Discussions:- Types of parthenogenesis

Synergistic contribution of malnutrition to child mortality, Explain Synerg...

Explain Synergistic Contribution of Malnutrition to Child Mortality? The synergistic contribution of malnutrition to child mortality is consistent across populations and can be

Regents for estimation of reducing sugar by fehling soxhlet, Define Regents...

Define Regents for Estimation of Reducing Sugar by Fehling Soxhlet Method? Fehling A solution - copper sulphate solution Fehling B solution - alkaline tartarate so

Floral initiation, Floral Initiation Activation is generally most mar...

Floral Initiation Activation is generally most marked in the central zone of the meristems. Most of the responses following inductive treatment have been recorded in differen

State the definition of respiration, State the Definition of respiration ...

State the Definition of respiration Respiration is an act of breathing. (i.e. rise and fall of the chest).  Respiration hastwo parts i.e. inhalation and exhalation. When we bre

What causes acid precipitation, What causes acid precipitation? Acid pr...

What causes acid precipitation? Acid precipitation is the result of air pollutants that combine with water vapor in the atmosphereto form acids, causing precipitation that is m

What is linkage, What is linkage? Two genes are assumed to be under lin...

What is linkage? Two genes are assumed to be under linkage, or linked, when they reside in the same chromosome. For instance, the research of the human genome discovered tha

Define the management of obesity, Define the Management of Obesity? Man...

Define the Management of Obesity? Management of obesity should be taken up with a clear understanding of the harsh realities of the problem and its outcome. It may be a frustra

What are the characteristics of soil, What are the characteristic of Soil ...

What are the characteristic of Soil It is commonly conceived as a plane at right angles to the surface. The upper part of a soil profile above the parent material in which proc

Excretory system, what is the excretory organ in protozoa?

what is the excretory organ in protozoa?

Find which of the following is most stable, Hydrogen ( h) has 1 electron; C...

Hydrogen ( h) has 1 electron; Carbon ( c) has 6 electrons, use the octet rule to determine which of the following is most stable. Note: some of these may have double bonds. A. O

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