Hybrid sterility, Biology

Assignment Help:

Hybrid sterility can be regarded as yet another form of interspecific sterility. The offspring of the interspecific crosses are mainly sterile. Geological studies have shown that the chromosomes of the hybrid individuals fail to synapse at the time of meiosis and thus result in either non-production of gametes or defective gametes. Unless the chromosomes of parents are accurately separated which might result in viable gametes,, in most cases the gametes are not produced and if produced they may not be fertile. The commonly cited example is the mule, a sterile animal the product of a cross between a donkey and a horse. Further, the hybrid species in general are found to have grossly abnormal reproductive system. If normal reproductive system is present, then meiosis is abnormal and non-viable gametes are produced. Thus various types of reproductive isolating mechanisms are at work in different groups of organisms to maintain the distinctness and uniqueness of species.


Related Discussions:- Hybrid sterility

Why rna was the first genetic material, Why does scientist think that RNA w...

Why does scientist think that RNA was the first genetic material?

De vega annuloplasty, De Vega Annuloplasty :  Classic De Vega annulop...

De Vega Annuloplasty :  Classic De Vega annuloplasty is done using 2'0' double armed polyester suture with pledgets on either end. It starts with one of the needles passed fr

Acid indigestion, Acid indigestion It is also known as ruminal acidosis...

Acid indigestion It is also known as ruminal acidosis, acute carbohydrate engorgement, rumen over load or lactic acidosis. Ingestion of large quantities of highly fermentable c

Chorionic villus sampling (cvs), CHORIONI C VILLUS SAMPLING (CVS)  - CV...

CHORIONI C VILLUS SAMPLING (CVS)  - CVS is done during 8th-10th week of pregnancy when abortion is safe. For CVS cells are sucked into a catheter passed through the cervix.

Nitrogen cycle, Nitrogen Cycle The nitrogen is an essential constituen...

Nitrogen Cycle The nitrogen is an essential constituent of protein - the building block of all living cells. It is also a major constituent of the atmosphere (79 per cent). Al

Define the integrity of gut or colon - dietary fiber, Define the Integrity ...

Define the Integrity of gut or colon? Dietary fibre especially fermentable fibres play an important role in maintaining the integrity of gut. SCFAs generated during fermentatio

Medical research - conservation of wildlife, Medical Research - Conservatio...

Medical Research - Conservation of Wildlife  Many animal species are used to test drugs and vaccines and to increase our understanding of human health and disease. The nine-b

What is the formula for calculation of bone distortion, What is the formula...

What is the formula for calculation of bone distortion The following formula can be used to calculate for distortion: Effective Bone available = Reference sphere diameter ×

Artificial kidney, ARTIFICIA L KIDNEY - Dialysis employs the process o...

ARTIFICIA L KIDNEY - Dialysis employs the process of diffusion across a semipermeable membrane to remove unwanted urea . Dialysis is of 2 types - 1. Haemodialysis -

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