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an owner has male dog that wants to use for breeding.the dog can hear so the owner knows his genotype is eithe

aneelies p asked:


DD or Dd.if the dogs genotype is Dd,the owner does nt wish to use him for breeding so the deafness gene will not pass on.this can be tested by breeding the dog to a deaf female
(dd).draw a punnet squares to ilustrate 2 possible crosses.

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This entry was posted on Sunday, July 12th, 2009 at 5:08 am and is filed under Biology. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

7 Responses to “an owner has male dog that wants to use for breeding.the dog can hear so the owner knows his genotype is eithe”

  1. boxerslive Says:
    July 13th, 2009 at 12:09 am

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    Wow thats a killer question…….ummm…..6?

  2. Jasmine Says:
    July 15th, 2009 at 10:18 am

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    Have him neutered. Problem solved.

  3. lirael1019 Says:
    July 17th, 2009 at 7:02 pm

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    Plug Dd and dd into the Punnett square. The two possible crosses are Dd and dd.

  4. Devon Says:
    July 17th, 2009 at 11:26 pm

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    Draw 2 punnet squares and put the female (dd) on top for both. Then put the DD male on the side of one square and the Dd male on the side of the other square.

  5. Joseph D Says:
    July 21st, 2009 at 3:03 am

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    Draw a punnett square, then another, and another. Then go to the dog shelter and get a dog there instead of adding to overpopulation. Finally, draw another punnett square.

  6. rahul Says:
    July 23rd, 2009 at 8:07 am

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    after seeing atleast 4 of your questions regarding punett square, i feel u should have a look at a good book.

    put D and D on the horizontal and d and d on the vertical lines. these are the gametes formed by the individuals. then write the genotypes in the boxes. in this case all 4 have Dd genotype.

    proceed in the same manner for the other cross ie by writing D and d on the horizontal and d and d on the vertical lines. the offsprings genotype can be expressed then. here, the ratio between Dd and dd is 1:1

  7. mareeclara Says:
    July 24th, 2009 at 7:28 pm

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    If its DD x dd all offspring will hear (they will all be Dd)
    If its Dd x dd you will get Dd, dd, Dd,dd so 50% will hear and 50% will be deaf…

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