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Mendelian Genetics

Quiz by Graeme Ritchie

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15 questions
Show answers
  • Q1
    Phenotype refers to an organism's:
    genetic composition
    physical appearance
    parents
    ratio
    30s
  • Q2
    Genotype refers to an organism's:
    genetic composition
    physical appearance
    environment
    parents
    30s
  • Q3
    Alternative forms of the same gene are called ...
    alleles
    dominant
    heterozygous
    genes
    30s
  • Q4
    Which of the following is a phenotype?
    Gg
    round seed
    parents
    heterozygous
    30s
  • Q5
    Which of the following is a genotype?
    25%
    round seed
    Gg
    phenotype
    30s
  • Q6
    Round seeds (R) is dominant to wrinkled seeds (r). The genotype(s) of round seed plants is / are ...
    RR only
    Rr only
    RR or Rr
    rr only
    30s
  • Q7
    Which of the following genotypes is heterozygous?
    Gg
    green nose
    GG
    gg
    30s
  • Q8
    Which of the following genotypes is homozygous recessive?
    rr
    RR
    red nose
    Rr
    30s
  • Q9
    Two true breeding (homozygous) parents are crossed similar to Mendel's P generation. A tall plant is crossed with a short plant. Tall is dominant to short. What is the expected outcome for the F1 generation?
    half tall, half short
    all tall
    all short
    3/4 tall, 1/4 short
    60s
  • Q10
    If the cross from the previous question is continued, what would be the expected outcome in the F2 generation?
    all short
    3/4 tall, 1/4 short
    all tall
    half tall, half short
    60s
  • Q11
    Round seeds (R) is dominant to wrinkled seeds (r). The genotype(s) of wrinkled seed plants is / are ...
    Rr
    ww
    RR
    rr
    30s
  • Q12
    If a plant that has round seeds has a parent that has wrinkled seeds, what is its genotype? (Assume that round is dominant.)
    rr
    RR
    Rr
    RrWw
    30s
  • Q13
    If you crossed two heterozygous plants, how many of the offspring will also be heterozygous?
    all
    half
    1/4
    3/4
    45s
  • Q14
    A plant that has purple flowers is crossed with one that has white flowers. The offspring were half white and half purple. What were the genotypes of the parents?
    PP x pp
    impossible to say
    Pp x pp
    Pp x Pp
    45s
  • Q15
    Which of the following outcomes would you expect from the following cross: tall, round (TTRR) x short, wrinkled (ttrr)
    all offspring short and wrinkled
    half tall, round; half short wrinkled
    all offspring tall and round
    9:3:3:1
    45s

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