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7/18/2013 7:24:00 AM
8
Biology gene question
I'm a bit confused here, Flood.
Okay, so I was studying Biology by doing a practice multiple choice test. I came up to a question which goes like this:
[u]If short hair in dogs is dominant, then[/u]:
A. Mating of Short haired dogs would produce only short haired offspring.
B. Mating of Long haired dogs would produce only Long haired offspring.
There were two other options, but forget those.
I picked A, but B was the correct answer. I don't get it, shouldn't the mating of two animals with a dominant gene always produce offspring with that gene?
Or am I just really derpy?
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1 ReplyEdited by SLAMt4stic: 7/18/2013 7:44:38 AMSince (Option A) Short hair is dominant that means a dog could potentially be carrying both the recessive gene (long hair: a) and the dominant gene (short hair: A). This means that the dog has the potential to have a long haired puppy if the short haired dog it mates with also has this recessive gene (remember the punnet square, pictured above). The long haired dogs (option B) would need to have two recessive genes in order to have long hair, so they only have the ability to pass on that recessive gene.
