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

Define needs for nutritional relief programme & intervention, Define needs ...

Define needs for Nutritional Relief Programme and Interventions? A general feeding programme is required during first stage when the affected population does not have sufficien

Receptors - eye, EYE HISTOR Y - Steva n described it first. S...

EYE HISTOR Y - Steva n described it first. Study of eye is ophthalmology. Instrument used to examine interior of eye is  ophthalmoscop e . SHAP E - More o

Iron age, Explain the factors that led to the decline of Science in Europe ...

Explain the factors that led to the decline of Science in Europe during iron age

Describe the process of suture removal, Describe the process of Suture remo...

Describe the process of Suture removal Sutures should be removed within 1-2 weeks of their placement, depending on the anatomic location. Prompt removal reduces the risk of sut

Describe the meaning of regulating evolution, Based on your reading of the ...

Based on your reading of the article entitled "Regulating Evolution", which of the following is a false statement? A. Individuals who are resistant to the malaria-causing para

Typical signs of hip fracture-shortening, In the case story, Reggie present...

In the case story, Reggie presented with three typical signs of hip fracture-shortening, adduction, and the lateral rotation of the affected limb. What causes these signs? (HINT-th

State the term - psychophysiology, State the term - Psychophysiology Th...

State the term - Psychophysiology This refers to the study of psychological theories using physiological measures. In other words, psycho-physiologists normally try to understa

Explain how a person can be dead, A person is declared to be dead upon the ...

A person is declared to be dead upon the irreversible cessation of spontaneous body functions; brain activity, or blood circulation and respiration. However, only about 1% of a per

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