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Genetics

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Genetics
  • Is there anyone on here that has good knowledge of genetics? I'm working on a few exercises I have to do for genetics class with my friend and would love some input.

    Here are the problems:

    <insert school name here> scientists recently discovered a rare breed of cat. One has green fur, one has red fur, and one has purple fur. The brilliant <school name> scientists discovered that this trait was due to only one gene with multiple alleles. They did 3 crosses, and each of the crosses involved a different parent cats.

    CROSS............................................. .....................RESULT
    Purple and Green ................................50% purple, 25% red, 25% green
    Green and Red............................................ 50% green, 50% red
    Red and Purple ............................................50% purple, 50% green

    Which color is recessive, which is somewhat dominant, and which is truly dominant?

    What are the genotypes of the parents of the 3 crosses?

    Scientists studying IQ discovered that genes affect IQ equally. Further studies showed the following:
    iiqq=IQ of 50
    Iiqq=IQ of 75
    IiQq=IQ of 100
    IIQq=125
    IIQQ=150

    This pattern is an example of _________

    If a person with IiQq crossed with an IIQq person, what would the phenotypic result be (IQ)?

    Punk rock hair has now been found to be genetic, and an example of incomplete dominance. One parent punk rocker has blue hair, and another has red hair. What would the phenotypes of the Fsubscript1 generation be? What would the phenotypes of the Fsubscript2 generation be?

    Any help would be greatly appreciated [:)] While I do have some ideas, somethings just aren't working...
  • appylady is a whiz.  So are others who aren't on as much now.  But why isn't blue showing up in the purple cross?
  • Okay... thanks... hopefully they're going to have a look at it once ':)'

    Well, because the parents of each cat only come in purple, green and red... (I suppose you're speaking about the cats?) Thus they can only give away those genes for the offsprings to receive. Blue was never mentioned, so it won't be possible that suddenly a blue cat comes off, without having some crazy mutation etc.