25 thoughts on “Incomplete Dominance and Codominance – A Quick Tutorial”

  1. thank you sooo much!! you’ve just expalined it well. its a really great help especially i’m having a demonstration in our class :))

  2. thanks, I needed a good way to differentiate incomplete and codominant alleles for my exam. The subscripts work well, thanks!

  3. I’m sure different teachers demonstrate this differently. The basics of the problem still work. In other words, the letters you used work just fine and you will get the same phenotypic ratio. However, the problem comes with using rr. Technically incomplete dominance both red and white are BOTH dominant and there is no recessive trait. Since we use lower case letters for recessive traits, I don’t like using them for a non-recessive trait. Make sense?

  4. or u could say green (50%) is 2/4. usually ur genotype will be out of four. so 2/4 is 50 percent and 1/4 is 25% and 3/4 is 75% and 4/4 is 100%. think of it like quarters ^_^

  5. It is a common mistake and LOTS of teachers actually get is backwards. For further information try: h t t p : / / w w w . emc.maricopa.edu/faculty/farabee/biobk/BioBookgeninteract.html

  6. Fractions, percents, and decimals are all the same thing. .5 is 1/2 is 50%. There is no difference in any of those.

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