Biology: Genetics And Punnett Squares Quiz!

8 Questions | Total Attempts: 10592

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Biology: Genetics And Punnett Squares Quiz!

This quiz is about Punnett squares and DNA genetic genes. How DNA works and an easier way to determine the percentage of genes. This quiz has eight essential questions to test your knowledge on the same. So, let's get started.


Questions and Answers
  • 1. 
    A heterozygous tall (Tt) plant is crossed at with a short plant (tt). The probability that offspring plants will be tall is:
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      100%

  • 2. 
    Organisms that have two different alleles for a particular trait are said to be:
    • A. 

      Hybrid

    • B. 

      Homozygous

    • C. 

      Heterozygous

    • D. 

      Dominant

  • 3. 
    According to the dihybrid cross below, what proportion of peas would be green and smooth?
    • A. 

      9/16

    • B. 

      1/4

    • C. 

      3/8

    • D. 

      1/16

  • 4. 
     What is the probability that a hamster will have black, fine hair?
    • A. 

      2/16 (1/8)

    • B. 

      4/16 (1/4)

    • C. 

      1/16

    • D. 

      8/16 (1/2)

  • 5. 
    When a plant breeder crossed two red roses, 78% of the offspring had red flowers and 22% had white flowers. According to these results, the allele for red flowers is most likely:
    • A. 

      Recessive

    • B. 

      Sex-linked

    • C. 

      Dominant

    • D. 

      Codominant

  • 6. 
    In pepper plants, the allele for hot flavor (H) is dominant to the allele for mild flavor (h). A farmer crosses a homozygous dominant plant with a recessive (mild) plant. What percentage of the offspring from this cross will have hot flavor?
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      100%

  • 7. 
    What are the four main bases of D.N.A.?
    • A. 

      Alleles, bacteria, D.N.A., and sunlight.

    • B. 

      Adenine, guanine, cytosine, and thymine.

    • C. 

      Oil, chinchilla, albino, and cement.

    • D. 

      Bristles, onions, grease, and tar.

  • 8. 
    White fur(b) in guinea pigs is dominated by black fur(B). What will be the probability of a hybrid offspring in the cross: BB x Bb?
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      100%

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