Biology

10th

grade

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DIHYBRID CROSS

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20 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt

    In mice black fur color (B) is dominant over brown fur color(b).In a cross between two heterozygous mice

    (Next 2 questions will be about this information)

    a. what is the probability of a black male mouse?

    1/2

    1/4

    3/4

    3/8

  • 2. Multiple Choice
    2 minutes
    1 pt

    b. What is the probability of 3 brown colored mice?

    1/8

    1/16

    1/64

    3/64

    27/64

  • 3. Multiple Choice
    2 minutes
    1 pt

    In pea plants tall stems(T) are dominant over short stems(t) and round seeds(R) are dominant over wrinkled seeds(r). Consider the following cross: TtRr X Ttrr

    Next 4 questions will be about this information. Please take notes.


    a. Find the number of possible phenotypes

    2

    4

    6

    8

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