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

Portal hypertension, Portal Hypertension: If you review the portal cir...

Portal Hypertension: If you review the portal circulation you may recall that normal blood flow to and from the liver depends on proper functioning of  the portal vein, the he

Plankton - aquatic ecosystem, Plankton - Aquatic Ecosystem This group ...

Plankton - Aquatic Ecosystem This group includes both microscopic plants (phytoplankton) and animals (zooplankton) found in all aquatic ecosystems, except certain swift moving

radioactive pollution, Radioactive pollution is a very special form of pol...

Radioactive pollution is a very special form of pollution of air, water and soil with radioactive material. Its nature of contamination and effects are different from those of othe

Show the factors affecting osseointegration, Q. Show the Factors affecting ...

Q. Show the Factors affecting osseointegration? The success or failure of osseointegration is dependent on the following factors. a) Occlusal load b) Biocompatibility of

Can you explain diabetes mellitus, Q. What is diabetes mellitus? Diabet...

Q. What is diabetes mellitus? Diabetes mellitus is the disease caused by action or deficient production of insulin and the consequent high blood glucose level and low glucose u

Dot blot, Dot blot  is the technique for measuring the amount of one pertic...

Dot blot  is the technique for measuring the amount of one perticular DNA or RNA in the highly complex mixture. The samples are spotted onto the hybridization membrane (like nitroc

Bacteria and archaea been placed in a seperate domain, Why have bacteria an...

Why have bacteria and archaea been placed in a seperate domain?

Why is there a sense of pressure change inside the ear, Why is there a sens...

Why is there a sense of pressure change inside the ear when someone goes down a mountain? The pressure inside the middle ear is keeps equal to the external ear (so to the exter

Enlist the modalities available for hand wash, Q. Enlist the modalities ava...

Q. Enlist the modalities available for hand wash? Modalities available for hand wishing are a) 2-4% Chlorhexidine b) 0.3-1 %Triclosan c) 0.6% Parachlorometaxylenol (PC

What is food pyramid, Food Pyramid The diabetes food pyramid divides fo...

Food Pyramid The diabetes food pyramid divides food into six groups. These groups vary with each other on the basis of size occupied in the pyramid. The largest i.e. grains, br

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