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

Define how the sticky ends are formed and get joined, a) A recombinant DNA ...

a) A recombinant DNA is formed when sticky ends of vector DNA and foreign DNA join. b) Define how the sticky ends are formed and get joined.

Total artificial heart in circulatory assist devices, Total Artificial Hear...

Total Artificial Heart :  Jarvik seven was the first successful total artificial heart supporting the patient for 112 days. The disadvantage is that the patient has to be connecte

Determine nutritional requirements in hot environments, Determine Nutrition...

Determine Nutritional Requirements in Hot Environments? Hot environments may be of two types: dry hot, as in the case of deserts or hot and humid in tropical rain forests and c

Humanitarian period and period of persecution, The Period of Persecution: ...

The Period of Persecution: Earlier. treatment of  the  inentally sick depended on men's various superstitious beliefs.  It was thought that sounds and motions are  the factors

Explain the sedimentation - air sampling, Explain the Sedimentation - Air S...

Explain the Sedimentation - Air Sampling? It is the simplest method, which involves exposing agar plates in air for specified time at a location to be sampled.  Microorganisms

Synthesis of citratefrom acetyl coa and oxaloacetate, Synthesis of citratef...

Synthesis of citratefrom acetyl CoA and oxaloacetate: Citrate synthase catalyses this aldol condensation reaction with the release of CoA. There are certain inhibitors to  this re

Define arterial vessels - arterioles and arteries, Q. What are arterial ves...

Q. What are arterial vessels, arterioles and arteries? Arterial vessels are every blood vessel that carries blood from the heart to the tissues, arterioles and Arteries are art

Into which phyla is the fungi kingdom divided, Fungi are classified in thei...

Fungi are classified in their own kingdom. Into which phyla is the fungi kingdom divided? Into which of those phyla are mushrooms classified? The kingdom fungi is separated in

Explain the spinal cord and its function, Spinal cord The elongated par...

Spinal cord The elongated part of CNS that runs downward in the spinal canal as continuationof medulla oblongata is called spinal cord. The functions of the Spinal Cord are

Skeletal system - girdles, GIRDLES - (i ) PECTORAL GIRDLE - ...

GIRDLES - (i ) PECTORAL GIRDLE - 4 bones. It is located on posterolateral part of upper region of the throax. It consists of scapula & clavicle. Scapula is placed

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