Coyne discusses two forms of sympatric speciation. Allopolyploid speciation and polyploid speciation. Compare and contrast the two types of speciation. Also discuss autopolyploidy and polyploidy. Research, name, and describe an organism that has arisen from polypoidy or autopolyploidy.
Once you have composed your answer, try to say "allopolyploid polyploid autopolyploidy polypoidy" four times as fast as you can (: and do tell if you were successful in your venture.
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An autopolyploid plant has all its chromosomes derived from one haploid set. An allopolyploid plant has its sets of chromosomes derived from two different plant species. Allopolyploids are fertile and survive while autopolyploids are sterile and must be propagated as clones by cuttings. Polyploidy is when an organism has more than two chromosomal sets. Autopolyploidy and allopolyploidy are types of polyploids. An organism that has arisen from polyploidy is a fern. I said it and i was successful :)
ReplyDeleteIn contrary to what Anusha said, I believe that autopolyploidy refers to the formation of an organism entirely off the multiple chromosome sets of one organism. As Jerry Coyne stated, an organism simply needs to double the organism's chromosome(202). This process involves only homologous chromosome. Allopolyploids are organisms that do not have homologous chromosomes since the organism created is developed from 2 or more other species. Allopolyploids are not natural, which means that allopolyploids can only be created through genetic engineering. An example of a polyploidy is the Citrullus lanatus. Professor H. Kihara, a Japanese scientist at Kyoto University, was the first to discover this plant in 1951, also known as the seedless watermelon.
ReplyDeleteSource: http://www.arhomeandgarden.org/plantoftheweek/articles/Seedless_Watermelon.htm