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

What is the vector of malaria, Q. What is the vector of malaria? How differ...

Q. What is the vector of malaria? How different is its behavior from the behavior of the vector of dengue fever? The vector of malaria is the mosquito of the genus Anopheles, a

What is vascular, Vascular Preoperative administration of a cephalospor...

Vascular Preoperative administration of a cephalosporin decreases the incidence of postoperative surgical site infection after arterial reconstructive surgery on the abdominal

Menstrual cycle- reproduction, Menstrual Cycle- Reproduction Menstrual...

Menstrual Cycle- Reproduction Menstrual cycles are characteristic of primates and do not occur in other vertebrate groups. The length of the cycle is highly variable, though 2

Explain foscarnet, Foscarnet  (Foscavir)  Foscarnet is an alternative t...

Foscarnet  (Foscavir)  Foscarnet is an alternative to ganciclovir and valganciclovir for treatment of CMV infection. It is approved for use in CMV retinitis, including progress

What is adaptive radiation, What is adaptive radiation? Adaptive radiat...

What is adaptive radiation? Adaptive radiation happens when a new population in a new environment, like an island, undergoes divergent evolution until the descendant population

Of which substance are microfilaments made, Of which substance are microfil...

Of which substance are microfilaments made? What are the properties of these elements that give motility to cells? Microfilaments are made of actin (a protein). The contractile

Harshey-chase experiement, What is the Harshey-chase experiement .explain i...

What is the Harshey-chase experiement .explain in detail

Energy transformation, ENERG Y TRANSFORMATION - During photosynthes...

ENERG Y TRANSFORMATION - During photosynthesis radiant energy is converted into chemical energy by green plants. In biluminiscent organisms .e.g glow worm, noctilluca &

Why in the preparation of a karyotype analysis, Why in the preparation of a...

Why in the preparation of a karyotype analysis is the use of a substance like colchicine interesting? The Colchicine is a substance that disallows the formation of microtubules

Explain nutrition diagnosis, Explain Nutrition diagnosis Nutrition dia...

Explain Nutrition diagnosis Nutrition diagnosis is the identification and labelling that describes an actual occurrence, risk of, or potential for developing a nutrition probl

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