Mr. Ducre' S Freshmen Biology Quiz #1, 2nd Quarter 2013/2014:

20 Questions | Total Attempts: 154

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Biology Quizzes & Trivia

Di-Hybrid Crosses and Pedigrees.


Questions and Answers
  • 1. 
    A cross between a white rooster and a black hen results in a 100% blue Andalusian offspring. When two of these blue offspring are mated  the probable phenotypic ratio seen in their offspring would be__________.
    • A. 

      100% blue

    • B. 

      75% black

    • C. 

      75% blue, 25%white

    • D. 

      25% black, 50% blue, 25% white

  • 2. 
    A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably_______.
    • A. 

      Homozygous recessive

    • B. 

      Heterozygous

    • C. 

      Homozygous dominant

    • D. 

      Haploid

  • 3. 
    In a F1 Dihybrid cross (WwGg X WwGg)  where W=round, w=wrinkled, G=yellow and g=green, what is the probability of obtaining an individual that is wrinkled , green and true breeding?
    • A. 

      1/16

    • B. 

      1/2

    • C. 

      9/16

    • D. 

      3/16

    • E. 

      1/4

  • 4. 
    An Allele is______.
    • A. 

      One of the bases of DNA

    • B. 

      An alternate form of a gene

    • C. 

      Another term for epistasis

    • D. 

      Present only in males and is responsible for sex determination

    • E. 

      Found in mitochondria but not in nuclei

  • 5. 
    An example of a genotype is:
    • A. 

      A tall pea plant

    • B. 

      R and r

    • C. 

      TtHH

    • D. 

      Hemophiliac

  • 6. 
    Crossing over results in a ___________.
    • A. 

      Female genotype

    • B. 

      Male genotype

    • C. 

      Genetic recombination

    • D. 

      Phenotype replication

  • 7. 
    Cystic Fibrosis and Tay-Sachs disease are typical of recessive disorders concentrated in_______.
    • A. 

      Families with a single child

    • B. 

      Ethnic groups

    • C. 

      Countries with hot, wet climates

    • D. 

      The United States

  • 8. 
    A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is____?
    • A. 

      O%

    • B. 

      25%

    • C. 

      50%

    • D. 

      75%

  • 9. 
    Genel located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called____________.
    • A. 

      Alleles

    • B. 

      Centromeres

    • C. 

      Phenotypes

    • D. 

      Gametes

  • 10. 
    In a cross between a round hybrid pea with a true breeding round parent (Ww x WW), what genotypic proportions would be observed of the offspring?
    • A. 

      Half heterozygous, half homozygous dominant

    • B. 

      Half round , half wrinkled

    • C. 

      All heterozygous

    • D. 

      All round

  • 11. 
    In di-hybrid crosses, the ratio of 9:3:3:1 indicates__.
    • A. 

      Codominance

    • B. 

      Independent assortment

    • C. 

      Intermediate Dominance

    • D. 

      Three alleles for each trait

  • 12. 
    In humans , red-green color blindness is __________.
    • A. 

      Caused by a recessive allele

    • B. 

      Equally common in both sexes

    • C. 

      Inherited in males from their fathers

    • D. 

      Produced in males by a heterozygous genotype

  • 13. 
    Pollination can be best described as_____.
    • A. 

      The fusing of the egg nucleus with the pollen nucleus

    • B. 

      The transfer of the male pollen grain to the female organ

    • C. 

      The formation of male and female sex cells

    • D. 

      The type of cell division that produces diploid gametes

  • 14. 
    The law of independent assortment states that the inheritance of alleles for one trait is not affected by the inheritance of alleles for a different trait if the genes for the traits are on _____
    • A. 

      Separate chromosomes

    • B. 

      Homologous chromosomes

    • C. 

      The same chromosome

    • D. 

      Homozygous chromosomes

  • 15. 
    There are 3 different genotypes resulting from a monohybrid cross. How many different genotypes would there be resulting from a dihybrid cross?
    • A. 

      4

    • B. 

      8

    • C. 

      9

    • D. 

      16

  • 16. 
    What is the probablity that on 4 flips of a coin, heads will occur on three flips and tails on 1?
    • A. 

      1/4

    • B. 

      1/2

    • C. 

      3/16

    • D. 

      1/8

    • E. 

      Insufficient information to answer this question

  • 17. 
    Eye color in humans is the result of ____________inheritance.
    • A. 

      Multiple allelic

    • B. 

      Polygenic

    • C. 

      Sex-linked

    • D. 

      Simple dominant

  • 18. 
    What would be the dimensions of a Punnett Square for the cross Ww x ww?
    • A. 

      4x4

    • B. 

      2x2

    • C. 

      2x1

    • D. 

      1x1

  • 19. 
    Which of the following give information about the phenotype but not the genotype?
    • A. 

      X Y

    • B. 

      Hemophiliac man

    • C. 

      Tall pea plant

    • D. 

      Hemophiliac

  • 20. 
    The type of inheritance shown when a red-flowering plant is crossed with a white flowering pland and only pink-flowering plants are produced is_______.
    • A. 

      Inbreeding

    • B. 

      Incomplete dominance

    • C. 

      Polygenic inheritance

    • D. 

      Codominance

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