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Plants can form hybrids relatively easily because of their pollination mechanism. If the species are closely related, hybridization is possible. For example, the domestic plum (Prunus domestica L., 2n= 48 chromosomes) occurred as a natural hybrid of blackthorn (Prunus spinosa L, 2n=32 chromosomes) and cherry plum ( (Prunus divaricata 2n=16 chromosomes). If the plants are not related, but still form hybrids, then the infertility of the hybrids can be overcome by mutation of polyploidy. Both of these processes occur in nature and are used by humans in breeding. In ecosystems, plant hybridization refers to the ecological mode of species formation.
Ksenia Topoleva
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How did the work of Gregor Mendel contribute to your current understanding of evolution and speciation?
He provided a basic understanding of mechanisms involved in heredity.
What can accumulate over successive generations to contribute to biological diversity?
Various mutations that occur over many, many generations will lead to different species. This is called speciation.
Why does polyploidy not cause speciation or even be associated with speciation?
Actually it is.
What is a cross between dissimilar individuals to bring together their best characteristics?
This breeding method is called hybridization. It is possible only in those cases where sexual barrier of crossing does not exist.
What hybridization is present in an octahedral molecular geometry?
sp3d2 hybridization. Example: sulfur hexafluoride (SF6)
What has been shown to cause rapid speciation?
1) Hybridization 2) Differential resource exploitation 3) Sexual selection 4) Allopolyploidy Basically all of the above.
What affect do humans have on speciation?
As part of the environment of other organisms humans can have great effects on speciation. Especially adaptive radiation. As we contribute heavily to the extinction of some species other species flow into those open niches and radiate outwards to possible speciation.
What are the geographical barriers that contribute to the process of speciation or natural selection?
Mountains, Oceans...um stuff like that
How did the work of Gregor Mendel contribute to your current understanding of evolution and speciation?
He provided a basic understanding of mechanisms involved in heredity.
What prevents speciation from occurring in sympatric populations?
Gene flow between populations can hinder the development of genetic differences necessary for speciation. Additionally, strong environmental pressures favoring specific traits in a population can limit genetic variation and prevent the emergence of distinct species. Lastly, hybridization between different groups can also counteract speciation in sympatric populations.
Why are allopolyploid hybrids are usually sterile?
The reason that many allopolyploid hybrids are sterile is that Many of these rapid changes may contribute to reproductive isolation and speciation
What is the hybridization of PH3?
The hybridization of PH3 is sp3
Speciation caused by change in the course of a river is an example pf divergent speciation?
Allopatric speciation.
What is the hybridization of KrF2?
The hybridization is sp3d.
Types of Speciation?
sympatric , allopatric and parapatric speciation
What can accumulate over successive generations to contribute to biological diversity?
Various mutations that occur over many, many generations will lead to different species. This is called speciation.
What is necessary for speciation to occur?
Isolation Is necessary for speciation to occur.
