I try to pwn biology
Created on: October 5th, 2006
I tried this on a genetics test, and it obviously did not amuse my professor.
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This is not a good test question. X0 cats? what the hell are those? Only 1 X chromosome? I suppose it would be easy enough to come up with the Pundit square for this question given a little more info... but... why X0? What the hell does that have to do with predicting kitten colors? And are these colors Dominant... Recessive? Not sure what your professor was looking for.
Regardless, Calico cats are almost always female. I guess that was the answer your oh so clever teacher wanted.
Your teacher is a dick.
That question is badly worded. 2nd year Biology major here. To determine somethings' "phenotype", you must make an empircal observation of the expresion of said genes. That is to say, what genes are actually there are irrelevant. Therefore your answer is partly satisfactory. I would give it a half point. (I also grade papers)
This is an example of codominance. Since the cat is XO then it cant be calico because you need both Xb and Xo. Cat color here is a sex linked trait and since a female cat needs both orange = Xo and black = Xb to be calico, the only possible phenotypes are black and orange for the female cat. The XO notation means its missing a chromosome so it is probably sterile and not well developed sex characteristics so in that respect your answer is still wrong.
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