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Pollination and adaptationExplain why a plant species in which self polination usually...
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High School Teacher
This is a great question! Generally inbreeding such as self pollination is considered to be detrimental to a species over time, because it can cause double copies of a defective gene to crop up in offspring. However in the case of a plant moving into a new environment, the ability to self pollinate is an advantage, because a single plant can still reproduce and colonize the new area. In self-pollination there is still some shuffling of the genes during meiosis, so not all of the offspring are identical.
Plants that reproduce asexually can do this as well, but in this case every single offspring will be genetically identical, which can cause vulnerabilities to the entire population. A group of genetically identical individuals is known as a clone, and all will share the same strengths and weaknesses.
A species that has to cross pollinate will have the highest genetic diversity, but it may be difficult for such a species to get established in a new area, since there has to be a large enough population of such a species that two or more individuals are blooming at the same time within the range of their pollination method (insects, wind, etc.).
Posted by pacorz on October 8, 2012 at 4:58 PM (Answer #1)
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