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 are the main complications of diabetes mellitus, Why do diabetic patie...

Why do diabetic patients often undergo dietary sugar restriction? What are the main complications of diabetes mellitus? Diabetic patients are often advised to ingest fewer carb

Equipment of circulatory assist devices, Equipment :  Basically, it has an...

Equipment :  Basically, it has an intra aortic balloon pump. A balloon with a capacity of 40 ml is passed percutaneously through the femoral artery up to the upper end of descen

Define historical development of food processing, Define Historical Develop...

Define Historical Development of Food Processing? Food processing began thousands of years ago to help people keep food through the lean seasons. Several methods of preserving

External factor - factor controlling metamorphosis in insect, External fact...

External factors - Factors Controlling Metamorphosis in Insects In few cases an external factor may be accountable for initiating moulting, as for instance in the blood su

What are his morning and bedtime doses, a) Donald is a 50 year old male wit...

a) Donald is a 50 year old male with a long history of bipolar disorder. He has been hospitalized three times in the last 8 months for manic episodes. He was just admitted to your

Define nutritional management of celiac disease, Define Nutritional Managem...

Define Nutritional Management of Celiac Disease? A gluten-free diet is the major therapy for celiac disease patients, particularly children, and may be needed for lifelong adhe

How is claimant need to make balance of probability, How is claimant need t...

How is claimant need to make balance of probability? When there is no loss suffered through a person after that there cannot be a civil proceeding not like under criminal law t

Define some adverse effects of saponins, Define some adverse effects of sap...

Define some adverse effects of saponins? The adverse effects of saponins may be described as under: - A well-known toxic effect is 'erythrocyte lysis' since they interact wi

Nutrient elements of plants, Nutrient Elements of Plants Let us first ...

Nutrient Elements of Plants Let us first find out the chemical composition of plants and see which element nature has selected to support their healthy growth. Only then we wi

The transport system in earthworm., The transport system in earthworm ...

The transport system in earthworm The scientific name of earthworm is megascolex. It consists of hearts, blood vessel and blood. There are 8 pairs of hearts in the earthw

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