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originally posted in: Biology gene question
Edited by Charlemagne: 7/18/2013 7:29:43 AM
7
I'll take a stab at this. While option A has the dogs shorthaired, it doesn't mean that there are no longhaired genes. It is still entirely possible that there will be a longhaired dog. Option B however suggests that the dogs have lost that gene through constant longhaired dogs being born and therefore the gene being 'weeded out' if you will. Edit: My first guess would have been A as well.
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  • Ahh thanks, that makes a lot of sense! (Yeah, this isn't really the type of post that can receive free internets, but here you go.)

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  • Thank you, I'll use it well.

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  • Unless that was implied in the question,No clue if it was or not, I'd side with OP

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  • It could be possible. Let's just pretend that the Long haired gene is 't' and the short haired gene is 'T.' Because T is dominant, the dogs will have short hair if they are Tt. Because t is recessive, that means that those dogs can't have any T gene and so must be tt. Tt dogs could still produce tt offspring.

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  • That's exactly it! :D Two dogs with Tt will still have short hair, but can produce long haired offspring because there's a chance of the offspring getting the recessive trait from both parents!

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  • Yeah, I get it now! :D I thought the question must have been set up with two right answers accidentally, but Charlemagne's explanation made me realize what A was actually saying.

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  • Yes the squares did always make it easier. I miss when drawing could solve all my problems...

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