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

Organic chemistry and macromolecules, identify 7 speccific ways in which yo...

identify 7 speccific ways in which you can diversify carbon-containing compounds

In dental traumatology-Pulp Tissue revascularization, In Dental Traumatolog...

In Dental Traumatology Traumatic injuries in young kids (8 to 14 years old male > female)  are commonly nowadays. Dental traumatic injuries are mostly in anterior teeth

Ecretory system, excretory product of marine teleost

excretory product of marine teleost

Determine the symptoms of cholera, Determine the Symptoms of Cholera  A...

Determine the Symptoms of Cholera  An infective dose of around one million organisms should be ingested to cause illness. The bacteria adhere to the small intestine wall, where

Explain mitosis properly, Q. Does the mitosis properly occur after or befor...

Q. Does the mitosis properly occur after or before the interphase? Is it a simple "point of view" issue? Mitosis have to be considered a succeeding phase after interphase since

Energy loss - energy flow, Energy Loss - Energy Flow Let us now take t...

Energy Loss - Energy Flow Let us now take the second point that is the loss of some energy at each trophic level. You might recall that the second law of thermodynamics states

Implementation of nursing care for thalassemia patient, Implementation of N...

Implementation of Nursing Care   Prepare the Patient for Diagnostic Evaluation Your role as a nurse is to provide continuing support to the child and family during diagnos

What is the basic structure of the hiv virus, What is the basic structure o...

What is the basic structure of the HIV virus? What is the function of the glycoproteins of its envelope? HIV is an RNA virus. In its core there are two strands of RNA and reve

Describe about coronary reactive hyperemia, Q. Describe about coronary reac...

Q. Describe about coronary reactive hyperemia? Myocardium depends almost completely on aerobic metabolism. Occlusion of a coronary artery even briefly produces an increase in c

What is tetralogy of fallot, What is Tetralogy of Fallot ? Figure...

What is Tetralogy of Fallot ? Figure: Anatomical location of tetralogy of fallot Indications for Surgery :  The diagnosis of tetralogy is considered as an indicatio

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