Sexual reproduction, Biology

Assignment Help:

SEXUAL REPRODUCTION

1.       Amphigony        -          Zygote is formed.

(i) Syngamy

Fusion of gametes.

(a) Endogamy - It involves self fertilisation. e.g. Taenia.

(b) Exogamy - It involves cross fertilisation. e.g. Earthworm, cockroach.

Again syngamy is of 2 types - (i) Isogamy - monocystis

(ii) Anisogamy - rest all

Special form of syngamy-

(i) Neotany - Sexual reproduction in larval stage, e.g. axolotal larva of ambyostoma, urochordata.

(ii) Polyembryony - The blastomeres formed by division of zygote separate at early stage. Each produces a complete individuals. e.g. flateworm, identical twins, armadillo produces 4 young ones from one zygote.

1412_male reproductive system.png

700_male reproductive system.png2213_male reproductive system rabbit.png


Related Discussions:- Sexual reproduction

What is the enzyme included, Is there any situation in which DNA is made ba...

Is there any situation in which DNA is made based on a RNA template? What is the enzyme included? The process in which DNA is synthesized having as template a RNA chain is know

What is class gastropoda in animal kingdom, What is Class Gastropoda in ani...

What is Class Gastropoda in animal kingdom? Snails and slugs are referred to as gastropods because of their characteristic body plan. "Gastro" is derived from the Greek word fo

Feeding on food masses, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain what is enzymes, Explain what is Enzymes? Enzymes are organic...

Explain what is Enzymes? Enzymes are organic substances that speed up, or catalyze, a chemical reaction. At a given temperature, molecules have varying amounts of energy, and

What are the nitrate reductase and nitrite reductase tests, Based on your u...

Based on your understanding of the nitrate reductase and nitrite reductase tests, why would the inclusion of nitrite inhibit anaerobic growth?

Accident proneness, Accident Proneness The close observation of accid...

Accident Proneness The close observation of accident causation theory brings out this fact that most accidents can be traced to error on the part of a number of individual em

Which disorders is most likely to underlie, A healthy, primiparous (first-t...

A healthy, primiparous (first-time) mother delivered a healthy infant several hours ago, but the mother has experienced postpartum hemorrhage. Which of the following disorders is m

Are there living beings without cells, Are there living beings without cell...

Are there living beings without cells? Viruses are measured the only living beings that do not have cells. Viruses are constitute by genetic material (DNA or RNA) enwrapped by

Define future challenges for dynamical network, Define Future challenges fo...

Define Future challenges for dynamical network? Graph theory is an old field of mathematics where biological applications are driving new advances. Mathematicians are supplemen

What factor contributed to the current variations, According to the theory ...

According to the theory of natural selection, what factor below contributed to the current variations in beak sizes of finch species on the Galapagos Islands? a. Finches dispersed

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