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Genetics Quiz Review

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  • What is the genotype of both of the individuals in generation I?
    1 Aa 2 aa
  • What is the term for this genotype? Rr
    Heterozygous
  • What is the term for this genotype? RR
    Homozygous Dominant
  • What can you assume about I1's parents from this pedigree?
    They both had at least one recessive allele for albinism.
  • What is an allele?
    A form of a gene
  • Is it possible for a man with type AB blood to have a child with type O blood?
    No
  • What is a phenotype?
    The physical expression of a gene
  • If you cross a true breeding White flowered plant with a True breading purple flowered plant what is the genotype Ratio?
    0 homozygous dom. : 4 heterozygous : 0 homzygous rec.
  • In a pedigree what does a partially shaded in square indicate?
    A carrier male
  • (Incomplete dominance) Two pink flowered plants are crossed to produce offspring. What is the phenotype ratio for their offspring?
    1 Red : 2 Pink : 1 white
  • What bloodtype is the universal acceptor?
    AB
  • Why is it harder for a female to get an X linked trait than a male?
    It takes both the Xs to have the trait for the female but only one X for the male to have it.
  • What color are the parents eyes?
    Maternal: Brown Paternal: Brown
  • What blood type is the universal donor?
    Type O
  • In a pedigree what does a fully shaded in square indicate?
    An affected male
  • What is the probability the child will have brown eyes?
    75%
  • How many chromosomes does a normal human karyotype have?
    23 pairs or 46 total
  • For X linked traits, who is more likely to express the trait?
    males
  • What are the two genotypes that can result in type A blood?
    IAIA and Iai
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