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Quiz Answers

Converting Genotype into Phenotype:

What do the following individuals look like?

    1- If A is dominant to a, what do "AA" "Aa" and "aa" look like?
    AA and Aa express the "A" phenotype. aa is the "a" phenotype.

    2- If B and b are codominant, what do "BB" "Bb" and "bb" look like?
    BB is the "B" phenotype. bb is the "b" phenotype. Bb is an intermediate between the two, or shows both looks or parts of each.

    3- If c is recessive to C, what do "CC" "Cc" and "cc" look like?
    CC and Cc are the "C" phenotype. cc is the "c" phenotype.

    4- If D is dominant to both d1 and d2, and d1 and d2 are codominant to each other, what do "DD" "Dd1" "Dd2" "d1d1" "d2d2" and "d1d2" look like?
    DD, Dd1, and Dd2 are the "D" phenotype.
    d1d1 is the "d1" phenotype.
    d2d2 is the "d2" phenotype.
    d1d2 will show elements of both the d1 and d2 phenotypes, or be an intermediate between the two.

Beginner:
Practice FOIL:

    5- BB x Bb = BB and Bb (simplified from BB Bb BB Bb)

    6- bb x Bb = bB and bb (simplified from bB bb bB bb)

    7- bb x bb = bb (simplified from bb bb bb bb)

    8- Bb x Bb = BB, Bb, Bb, and bb

    9- BB x bb = Bb (simplified from Bb Bb Bb Bb)


Intermediate:
Combine two results. Use FOIL on each trait, then combine with a grid.

    10- CCDD x CcDD
     CCCc
    DDCCDDCcDD


    11- ccDd x ccdd
     Dddd
    ccccDdccdd


    12- CCdd x ccDD
     Cc
    DdCcDd


    13- CcDd x CcDd
     CCCccCcc
    DDCCDDCcDDcCDDccDD
    DdCCDdCcDdcCDdccDd
    dDCCdDCcdDcCdDccdD
    ddCCddCcddcCddccdd


    14- Ccdd x CcDd
     Dddd
    CCCCDdCCdd
    cCcCDdcCdd
    CcCcDdCcdd
    ccccDdccdd


Advanced:
Use FOIL for each trait to get all three results. Combine two into a grid, then add the third.

    15- aabbcc x AaBbCc
     Aaaa
    BbAaBbaaBb
    bbAabbaabb

     Cccc
    AaBbAaBbCcAaBbcc
    AabbAabbCcAabbcc
    aaBbaaBbCcaaBbcc
    aabbaabbCcaabbcc


    16- aaBbCc x AabbCc
     Aaaa
    BbAaBbaaBb
    bbAabbaabb

     CCCccCcc
    AaBbAaBbCCAaBbCcAaBbcCAaBbcc
    AabbAabbCCAabbCcAabbcCAabbcc
    aaBbaaBbCCaaBbCcaaBbcCaaBbcc
    aabbaabbCCaabbCcaabbcCaabbcc


    17- AaBbCc x aaBbcc
     Aaaa
    BBAaBBaaBB
    BbAaBbaaBb
    bBAabBaabB
    bbAabbaabb

     Cccc
    AaBBAaBBCcAaBBcc
    AaBbAaBbCcAaBbcc
    AabBAabBCcAabBcc
    AabbAabbCcAabbcc
    aaBBaaBBCcaaBBcc
    aaBbaaBbCcaaBbcc
    aabBaabBCcaabBcc
    aabbaabbCcaabbcc


    18- AaBbCc x AaBbCc
     AAAaaAaa
    BBAABBAaBBaABBaaBB
    BbAABbAaBbaABbaaBb
    bBAAbBAabBaAbBaabB
    bbAAbbAabbaAbbaabb

     CCCccCcc
    AABBAABBCCAABBCcAABBcCAABBcc
    AABbAABbCCAABbCcAABbcCAABbcc
    AAbBAAbBCCAAbBCcAAbBcCAAbBcc
    AAbbAAbbCCAAbbCcAAbbcCAAbbcc
    AaBBAaBBCCAaBBCcAaBBcCAaBBcc
    AaBbAaBbCCAaBbCcAaBbcCAaBbcc
    AabBAabBCCAabBCcAabBcCAabBcc
    AabbAabbCCAabbCcAabbcCAabbcc
    aABBaABBCCaABBCcaABBcCaABBcc
    aABbaABbCCaABbCcaABbcCaABbcc
    aAbBaAbBCCaAbBCcaAbBcCaAbBcc
    aAbbaAbbCCaAbbCcaAbbcCaAbbcc
    aaBBaaBBCCaaBBCcaaBBcCaaBBcc
    aaBbaaBbCCaaBbCcaaBbcCaaBbcc
    aabBaabBCCaabBCcaabBcCaabBcc
    aabbaabbCCaabbCcaabbcCaabbcc


Expert:
Use the shortcut shown in Step 9 by multiplying "odds per locus" to find the desired outcome.

    19- When crossing AaBbCcDdee x aaBbccDdEe, what are the odds of getting aabbccddee?
    aa = 1/2
    bb = 1/4
    cc = 1/2
    dd = 1/4
    ee = 1/2
    Total = 1 in 128 per egg.


    20- When crossing AaBbCcDdEe X AaBbCcDdEe, what are the odds of getting aabbCcddee?
    aa = 1/4
    bb = 1/4
    Cc = 1/2
    dd = 1/4
    ee = 1/4
    Total = 1 in 512 per egg.


    21- When crossing AaBbCcDdEe X AaBbCcDdEe, assuming "e" is recessive, what are the odds of getting offspring showing recessive traits a, b, c, and d, but not e?
    aa = 1/4
    bb = 1/4
    Cc = 1/4
    dd = 1/4
    ee = 3/4
    Total = 3 in 1024 per egg.



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