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

Explain the requirement of nutrition during stress, Explain the requirement...

Explain the requirement of Nutrition during Stress? We all experience stress at some time or the other in life. Stress is the condition or stimulus that threatens the body's ho

Protozoa, Locomotion,nutrition and reproduction in ptotozoa

Locomotion,nutrition and reproduction in ptotozoa

How are the heterotrophic beings divided, How are the heterotrophic beings ...

How are the heterotrophic beings divided in the ecological study of food interactions? The Heterotrophs are divided into consumers and decomposers. An ecosystem can survive wit

Objectives of eyelids-lacrimal apparatus-tear film dynamics, Define the obj...

Define the objectives of eyelids, lacrimal apparatus and tear film dynamics. By familiar with section, you should be capable to understand: a. All the functions of the eyeli

Define the disorders due to the iodine deficiency, Define the Disorders due...

Define the Disorders due to the iodine deficiency? Mild goitre, i.e., a larger thyroid gland than normal. The mildest form of goitre ranges from those only detectable by to

Coccidiosis, C o c c i d i o si s It is a protozoan disease, c...

C o c c i d i o si s It is a protozoan disease, caused by Eimeria species, resulting in enteritis, debility and anaemia. E t iology: It is caused by E.

What is cell biology, What is cell biology? Cell biology is the ...

What is cell biology? Cell biology is the science of studying how cells function like as their reproduction and metabolism, their internal and external anatomy.

Levels of biodiversity, There are three levels of diversity viz. genetic, ...

There are three levels of diversity viz. genetic, species and ecosystem diversity. In effect, these levels cannot be separated. Each is important, interacting with a nd influencin

How campylobacteriosis occurs in humans, How CAMPYLOBACTERIOSIS  occurs in...

How CAMPYLOBACTERIOSIS  occurs in humans C. jejuni frequently contaminates raw chicken. Survey shows that 20-100% of retail chickens are contaminated. Many healthy chickens car

Mechanical removal of gutta percha-endodontics principles, Mechanical remov...

Mechanical removal of Gutta percha - use k file to create channel then removed by H file Remove gutta percha by rotary ( Gates Glidden = GG ) - use suitable size and remo

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