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Beginner's Genetics
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<blockquote data-quote="randiliana" data-source="post: 502926" data-attributes="member: 2308"><p>Actually, since there are only 3 base colors it isn't that hard to understand. Once you get your mind wrapped around how genes work things come together nicely. The expression of all the colors and patterns I have discussed are controlled by just a couple genes each. Once you know which is dominant and which is recessive you can start to SEE what is in your cows. Look at how Black/Red works, and everything else pretty much works the same. The easy ones are the Incompletely dominant ones, as if there is one copy there you can see it. They don't hide, and you can make a pretty good guesstimate on whether there is only 1 copy or if the animal is homo for the gene.</p><p></p><p>The other big thing to remember is that there IS only 3 base colors, every other color or pattern is because of another set of genes working on top of the base color, and most of the patterns can work with each other. </p><p></p><p>So if you have a tan roan white faced animal for example, you can say that the animal is ee(red) Rr (roan) Dcdc(dilution) ShS(whitefaced/solid). There are other genes in there that restrict how much the animal is diluted, and how much white is on the animal, but the ee Rr Dcdc ShS is the basic. And, it is visible.</p></blockquote><p></p>
[QUOTE="randiliana, post: 502926, member: 2308"] Actually, since there are only 3 base colors it isn't that hard to understand. Once you get your mind wrapped around how genes work things come together nicely. The expression of all the colors and patterns I have discussed are controlled by just a couple genes each. Once you know which is dominant and which is recessive you can start to SEE what is in your cows. Look at how Black/Red works, and everything else pretty much works the same. The easy ones are the Incompletely dominant ones, as if there is one copy there you can see it. They don't hide, and you can make a pretty good guesstimate on whether there is only 1 copy or if the animal is homo for the gene. The other big thing to remember is that there IS only 3 base colors, every other color or pattern is because of another set of genes working on top of the base color, and most of the patterns can work with each other. So if you have a tan roan white faced animal for example, you can say that the animal is ee(red) Rr (roan) Dcdc(dilution) ShS(whitefaced/solid). There are other genes in there that restrict how much the animal is diluted, and how much white is on the animal, but the ee Rr Dcdc ShS is the basic. And, it is visible. [/QUOTE]
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