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quick genetics question

Discussion in 'DAT Discussions' started by RozhonDDS, Jul 31, 2006.

  1. RozhonDDS

    7+ Year Member

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    Does GgAa x GgAa make a 9:3:3:1 cross?

    and what does Ggaa x GgAa make?



    Lets assume for both of these questions that
    G=dominant
    g=recessive

    A=dominant
    a=recessive


    THANX, DAT tomorrow and i and forgetting the most obvious details of genetics.
     
  2. tinman831

    tinman831 ¯\_(ツ)_/¯
    Staff Member Administrator Dentist Lifetime Donor Verified Expert Verified Account 10+ Year Member

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    Any dihybrid cross between two heterozygous traits will yield a 9:3:3:1 phenotype offspring.

    GgaaxGgAa gives you

    2 GGAa
    2 GGaa
    4 GgAa
    4 Ggaa
    2 ggAa
    2 ggaa
     
  3. Notoriousjae

    Notoriousjae DAT Rockstar
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    Does GgAa x GgAa make a 9:3:3:1 cross?
    YES

    what does Ggaa x GgAa make?
    1/8 GGaA, 1/4 GgaA, 1/8 ggaA, 1/8 GGaa, 1/4 Ggaa, 1/8ggaa.


    good luck tomorrow Rozhon :thumbup:
     
  4. Notoriousjae

    Notoriousjae DAT Rockstar
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    damn tinman beat me to it. :) btw your dog looks cool with that party hat :smuggrin:
    I have the same ratios. you just need to convert them to whole numbers
     
  5. KiTmAn

    KiTmAn Kit
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    yup thats wat i get..!!!
     
  6. tom_servo_dds

    tom_servo_dds Senior Member
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    ditto
     
  7. dontbam

    dontbam Member
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    what? dont u only get "1" for the recessive ggaa according to 9:3:3:1?

    9: G-A-
    3: ggA-
    3: G-aa
    1: ggaa

    edit: okay oops, i failed to see tinman wrote GgaaxGgAa,

    pardon me!
     

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