Genetics And Punnett Squares Quiz (4)

10 Questions  I  By Raleighegypt
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 Genetics And Punnett Squares Quiz (4)
Its about Punnett squares and DNA genetic genes. How DNA works and a easier way to determine the percentage of genes.

  
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  • 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. 

      Hybird

    • B. 

      Homozygyous

    • C. 

      Heterozygous

    • D. 

      Dominant


  • 3. 
    A cross of a black chicken (BB) with a white chicken (WW) produce all speckled offspring (BW). This type of inheritance is known as ..
    • A. 

      Incomplete Dominance

    • B. 

      Polygenic Inheritance

    • C. 

      Codominance

    • D. 

      Multiple Alleles


  • 4. 

    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


  • 5. 

     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)


  • 6. 
    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


  • 7. 
    Tracey has three brothers. One of Tracey's brothers has sickle-cell anemia, a disease caused by a recessive allele. She, her parents, and the other children do not have it. If Tracey's parents have another child, what is the chance that the child will have sickle-cell anemia?
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      75%


  • 8. 
    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%


  • 9. 
    Which four items are living things with D.N.A.?
    • A. 

      Water, tree, birds, soil

    • B. 

      Animals, people, plants, bacteria

    • C. 

      Desk, clouds, hair, yeast

    • D. 

      Cells, bacteria, metal, fertilizer


  • 10. 
    What are the four main bases of D.N.A.?
    • A. 

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

    • B. 

      Adenine, guanine, cytosine, thymine

    • C. 

      Oil, chinchilla, albino, cement

    • D. 

      Bristles, onions, grease, tar


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