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Polygenic Inheritance
does anyone know anything about it, i am so confused, please help, i will rate 5's!
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Note: This is NOT an answer to tell you what polygenic inheritance is, seeing as that has already been answered twice. This is an answer to inform you that there are very easy ways to find out the answer to that exact question on your own.
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Check the last half of the page.
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Oh, yes, I can help.
Okay, a lot of our traits are determined by one gene, with two alleles. One from mom, one from dad. Lets take height for example. "H" is the dominant (tall) gene, "h" is the recessive (short) gene. You can get: both dominant, both recessive, or one of each.
If you get both dominant, then you WILL have this trait, and all of your children will have at least one dominant gene. If you get both recessive, you will not have the trait, and none of your children will have the dominant gene. If you get one of each you will physically display the trait, but your children may or may not receive the dominant gene.
Now, that's fairly simple and straightforward. Not all traits are. Eye color, for example is controlled by several genes, with many alleles. it gets VERY complex. Eye color is polygenic inheritance, because it deals with more than one gene describing just one trait. There are others, as well.
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This is what my biology book says about it:
"Polygenic inheritance is the inheritance pattern of a trait that is controlled by two or more genes. The genes may be on the same chromosome or on different chromosomes and each gene may have two or more alleles"
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If not try dictionary.com
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