niksta-- there is a thing called co-dominance. The example we use in our bio class for co-dominance is roan cattle. They come in three different colour variations, red, white and "pink" (red hair with long white hairs despersed throughout)... If a red and a white parent were to breed together then some of their offspring may be "pink" (roan) some will be white and some will be red (depending on whether the parents are hetero or homozygous).Niksta123 said:Is your question one related to an actual HSC past question/or trial paper?
Or are you just talking about when you're looking at a pedigree?
Normally you 1 trait that dominant & 1 thats recessive...
You don't normally have a trait that is in between - at least I have never seen a question like that. if you have specific question to do with this please send it through - and I might be able to help you more specifically.
yea ur rite as u wrote the alles r blended therefore it will be incomplete dominane , co dominance is when the two alles r expressed not blendedhellopian said:Wavy hair would be the result of a heterozygous cross, because the alleles for straight/curly hair are co-dominant. If you think about it, wavy hair isn't quite curly, yet isn't quite straight, so it wouldn't really fit under curly, but in between.
"The alleles for curly hair and straight hair are examples of alleles for a trait that are codominant. Individuals with curly hair are homozygous for curly hair alleles. Individuals with straight hair are homozygous for straight hair alleles. Individuals who are heterozygous, with one of each allele have wavy hair, which is a blend of the expressions of the curly and straight hair alleles."
There is also the Snapdragons where one is red the other white and when a heterozygous cross is produced it is pink. I remember learning about the Roan cattle too.
i'm pretty sure people do.with hair colour brown is the dominant trait and blonde the recessive trait - however, is it possible for co-dominance to occur like in the shorthorn cattle where people have individual brown hairs and indicidual blonde hairs?