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10-1 CHECK Mendelian Genetics

Quiz by Lori Stroud

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19 questions
Show answers
  • Q1
    Incomplete dominance occurs when the heterozygous phenotype is an intermediate phenotype between the two homozygous phenotypes.
  • Q2
    In radishes, color is controlled by incomplete dominance, where homozygous dominant radishes are red, homozygous recessive radishes are white, and the intermediate radishes are purple. What phenotypic ratios would you expect from crossing two heterozygous plants?
    3:1 red:white
    1:2:1 red:purple:white
    1:1:1 red:purple:white
    2:2 red:white
  • Q3
    Traits controlled by genes on the X chromosome are called sex-linked traits. In what individuals are recessive sex-linked traits more commonly expressed?
    females because they have no Y chromosome
    males because they have only one X chromosome
    males because they have a Y chromosome
    females because they have two X chromosomes
  • Q4
    Why is sickle-cell disease a codominant genetic condition?
    An intermediate phenotype is expressed.
    Both alleles are expressed in the homozygous condition.
    Both alleles are expressed in the heterozygous condition.
    No alleles are expressed in the heterozygous condition.
  • Q5
    Human blood groups are determined by __.
    incomplete dominance
    multiple alleles
    single alleles

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