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A trait controlled by many genes is an e...

A trait controlled by many genes is an example of :

A

Codominance

B

Incomplete dominance

C

Pleiotropy

D

Polygenic inheritance

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  • Study the given pedigree chart showing the inheritance if an X-linked trait controlled by gene 'r' What will be the genotypes of individuals A,B,C and D respectively ?

    A
    `XX,X^(r)Y,X^(r)X,XY`
    B
    `X^(r)X^(r),XY,XX,XY`
    C
    `X^(r)X,X^(r)Y^(r),X^(r)X^(r),X^(r)Y`
    D
    `XX,X^(r)Y^(r),XX,XY`

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    A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc xx AaBbCc, the phenotypic ratio of the offsprings was observed as : 1:6xx:20xx:6:1 what is the possibe value of x?

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