Sympatric speciation, Biology

Assignment Help:

Sympatric speciation can be regarded as speciation where parent species gives rise to a daughter species without the individuals of a species being separated by space or territory. Both instantaneous and gradual models of sympatric speciation have been proposed. Barring one mode of instantaneous speciation by a mechanism known as polyploidy, other modes of sympatric speciation have remained quite controversial. Polyploidy is quite common among plants. (For a detailed discussion on polyploidy refer to Unit 10 of Block 2 of LSE-03 of Genetics course). A cross between two diploid plants could result in a tetraploid hybrid. The hybrid would remain largely reproductively isolated from its diploid parents. The reason for such isolation is that due to back-crossing if a triploid individual were to be formed, it will produce a high proportion of nonviable gametes. There is also a possibility that interbreeding between deploid and tetraploid forms or between different tetraploids may give rise to other polyploids.


Related Discussions:- Sympatric speciation

Nursing process - chronic bronchitis, Nursing Process History ...

Nursing Process History Character of onset and duration of cough, sputum production, dyspnea, pain in right upper quarant.  Smoking history.  Past illness -

What is replication, Question 1 Write a short note on the following- ...

Question 1 Write a short note on the following- Structure of DNA. Satellite DNA Transcription. pBR 322 vector Cytokines Microarrays Question 2 What is

What are genotypes and respective blood types of abo system, What are the g...

What are the genotypes and respective blood types of the ABO system? Ever since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB

Explain quantitative methods - therapeutic diets, Quantitative Methods - Th...

Quantitative Methods - Therapeutic diets Quantitative Methods: These are often essential for constructing  Lherapeutic diets.  The  two ways by which  this could be done are as

Plants are supplied with adequate amount of phosphorus, Plants are supplied...

Plants are supplied with adequate amount of phosphorus Phosphorus has also been associated with early maturity of crops particularly the cereals. Its shortage is accompanied by

Respiration, abnormal lung volumes and capacities

abnormal lung volumes and capacities

Explain about the drying - methods of food processing, Explain about the Dr...

Explain about the Drying - methods of food processing? Drying is the oldest and probably the simplest way of preserving food. It is usually accomplished by the removal of water

Contraceptive pill - reproduction, Contraceptive Pill - Reproduction ...

Contraceptive Pill - Reproduction About sixty million women in the world are currently using oral steroid contraceptives. These contraceptives usually consist of a synthetic

Phototropism - root and shoot morphogenesis, Phototropism - Root and Shoot ...

Phototropism - Root and Shoot Morphogenesis  Paratonic growth movement of part of a plant in response to light, e.g. bending of stems of indoor plants towards a window, brough

Dissimmilarity between an ecosystem and a biome, What is the difference bet...

What is the difference between an ecosystem and a biome?

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