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    Gene Interaction

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    Problems are attached on a scan. They are numbered 1 through 3 and they are on the last page. If have attached the lab from which this problem came from.

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    Solution Preview

    Please see the attached file.

    Further explanation for question 1 is attached (genetics_forkmethod.doc)

    Answer 1:

    P ------ C1C1SuSu x CCsusu

    F1 ...... C1CSusu

    F2 can be represented in fork method as follows :

    Su (3/4) C1Su (9/16) , Yellow- Smooth

    C1 (3/4)

    su (1/4) C1su (3/4), Yellow - wrinkled


    Su (3/4) CSu (3/4), Purple - Smooth

    C (1/4)

    su (1/4) Csu (1/4) Purple - wrinkled

    Answer 2:

    Genotype Phenotype
    Parent 1 : AACCRR Parent 1 : Colored with anthocyanin pigment
    Parent 2 : aaccrr Parent 2 : colorless (without anthocyanin pigment

    F1 : AaCcRr F1 : Colored with anthocyanin pigment

    Answer 3 :

    F2 Genotypes:
    It is obtained by crossing AaCcRr & AaCcRr
    Each Parent will produce 8 gametes (ACR, ACr, Acr, AcR, aCR, acR, ...

    Solution Summary

    Complimentary gene is interallelic interaction in which metabolic product of one gene compliment the metabolic product of another gene. If any one of them is absent, phenotypic expression fails to appear.