Distinguish between codominance and Incomplete dominance.?

Answer 1

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Codominance is when neither of the two forms of a trait are dominant over another. This means that both forms are dominant at the same time (hence "co"- together). For example, let's say in bunnies, black coats (BB) are codominant with white coats (WW). If you breed the two bunnies, the heterozygous offspring (BW) will have both black and white fur.

Incomplete dominance is when neither form of the trait are completely dominant over another. The heterozygous offspring would have a "blend" of their parents' phenotypes, or just something that looks in the middle. For example: if you have a red snapdragon (RR), and you mate it with a white snapdragon (WW), you will get pink snapdragons (RW).

Answer 2

codominance is like mixing a black cow and a white cow and getting a white cow with black spots.

incomplete dominance is when you mix a black cow and white cow, and you get white. I think... I'm not completely sure on this one.

Answer 3

incomplete dominance will produce an entirely different phenotype. this means that crossing a white snapdragon and a red snapdragon will result in a completely pink snapdragon.

co-dominance will produce a mixed phenotype. the best example that i can think of is cows. if you cross an all-white cow and an all-red cow, what you will get appears to be a light red cow; however, if you look at the fur/hair of the cow, you will see two different colors of hair- white and red. or the cow will have red/white splotches. these cows, btw, are called roan cows.

i hope this helps, i'm a farm girl, so i understood the cow thing better than some people might!

Source(s):

my ap biology class- we even used the same examples!

Answer 4

They are very siimilar traits. In both of these non-mendelian methods of inheritance there is a third phenotype produced when individuals have a heterozygous phenotype. It is not necessarily obvious what this phenotype will be. It isn't like blending paint. A red and white flowered plant with co-dominant traits may produce a pink flower when the hybrid condition is present, or a black mouse crossed with a white mouse might produce a reddish-brown mouse when the heterozygous condition is inherited.
Statistically the crosses are interpreted much the same when examining the progeny.