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    Ok i need help! with dihybrid crosses if you hjave one bird with CwCw x AfAf and another bird with CwCb x AfAs

    Cw=white feathers
    Cb=blackfeathers
    Af=frizzy feathers
    As=straight feathers
    And all are codominant


    what r the gametes and how do you cross them to find the offspring genotype and the offsrping phenotype
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    (Original post by flippinmentaljo)
    Ok i need help! with dihybrid crosses if you hjave one bird with CwCw x AfAf and another bird with CwCb x AfAs

    Cw=white feathers
    Cb=blackfeathers
    Af=frizzy feathers
    As=straight feathers
    And all are codominant


    what r the gametes and how do you cross them to find the offspring genotype and the offsrping phenotype

    Ok... colour coded to make things clearer

    Parental gentotypes: CwCwAfAf and CwCbAfAs

    Possible parental gametes:

    CwAf and CwAf, CwAs, CbAf, CbAs

    Offspring genotypes and genotypes

    CwCwAfAf = white, frizzy feathers
    CwCwAfAs = white, frizzy and straight feathers
    CwCbAfAf = white and black, frizzy feathers
    CwCbAfAs = white and black, frizzy and straight feathers (strange bird this 1)

    Ok... all equally chance of forming of 25%
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    Thank you i get so confused when they sord questions like this one was...and im guessing the phentypic ratio would be 1:1?
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    1 : 1 : 1 : 1

    therefore there is a 1/4 (or 25%) chance of each phenotype
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    (Original post by flippinmentaljo)
    Thank you i get so confused when they sord questions like this one was...and im guessing the phentypic ratio would be 1:1?
    I think ti would be 1:1:1:1
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    Yeah well i had the right numbers.... i just obv cant cant... my brains turned to mush with all the biology....muh....thank you peeps!
 
 
 
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