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

What is osmosis, What is Osmosis ? Osmosis :  Osmosis refers to the...

What is Osmosis ? Osmosis :  Osmosis refers to the diffusion of water across a semi-permeable membrane from an area of higher concentration of water to an area of lower con

What do you mean by taenia solium or taenia saginata, Q. If a person eats r...

Q. If a person eats raw or badly cooked meat infected by Taenia solium or Taenia saginata will this person develop taeniasis or cysticercosis? If a person eats badly cooked or

Illustrate internal epithelium of the bowel, Q. Is the internal epithelium ...

Q. Is the internal epithelium of the bowel the alike as it was one month ago? The internal epithelial covering of the intestine acts as means of nutrient absorption and as prot

Describe the rationale behind sterilization, Q. Describe the rationale behi...

Q. Describe the rationale behind sterilization? Rationale for sterilization: Source of potential infection that exists in dental office include hands, saliva, nasal secretion,

Vitamin – c, VITAMIN - C Also known as ascorbic acid / anti viral v...

VITAMIN - C Also known as ascorbic acid / anti viral vitamin / anti cancer vitamin / anti rabies vitamin / anti scurvy vitamin. It is the earliest known vitamin. It

How do birds reproduce, Q. How do birds reproduce? Birds like every ver...

Q. How do birds reproduce? Birds like every vertebrate have sexual reproduction. Their embryos develop within shelled eggs containing extraembryonic membranes and exterior the

Portion of double-stranded dna, Suppose that a portion of double-stranded D...

Suppose that a portion of double-stranded DNA in the middle of a large gene is being transcribed by an RNA polymerase. As the polymerase moves through the sequence of six bases sho

Explain about bioactive materials, Explain about Bioactive materials Bi...

Explain about Bioactive materials Bioactive materials: Certain glasses, ceramics, and glass-ceramics that contain oxides of silicon, sodium, calcium and phosphorus (SiO 2 , Na

Major divisions of the chordate phylum, Q. What are the two major divisions...

Q. What are the two major divisions of the chordate phylum? Chordates are divided into vertebrates and protochordates (urochordates and cephalochordates). Q. What are the d

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