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    Crossing homozygous plants with differing characteristics

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    I had to cross a homozygous dominant smooth, yellow seeded plant with a homozygous excessive wrinkled, green seeded plant, and this is what I came up with:

    A. The P1 genotypes ___YY___ x ___yy__
    B. Possible gametes are ___Y___, __Y___, ___y__ and __y___

    *Then I had to use the Punnett square and complete the cross answering the questions, and this is what I came up with:

    Y Y
    Yy Yy
    Yy Yy

    The genotypes? ___Yy___
    What are the phenotypes of all of the F1 individuals? ___________

    Then I started to have problems with the following:

    I'm suppose to be a helper in Mendel's pea garden and he has given me a sack of pea seeds, and told me to count the smooth seed coats and wrinkled seed coats. I had counted 690 smooth (S) and 230 (s). These are the F2 plants.

    a. The phenotypic ratio is ________: _________
    b. The P1 genotypes are _______ x ________
    c. What is the genotype of the F1 generation? ____________
    d. Cross two of the F1 plants to see if the answer is correct.

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    Solution Summary

    The expert examines crossing homozygous plants with differing characteristics.