Quiz: Take The Easiest Biology Practice Questions

18 Questions | Total Attempts: 942

SettingsSettingsSettings
Please wait...
Quiz: Take The Easiest Biology Practice Questions

.


Questions and Answers
  • 1. 
    The phenotypic expression of a gene at one locus alters that of a gene at 2nd locus is:
    • A. 

      Polygenic inheritance

    • B. 

      Pleiotropy

    • C. 

      Epistasis

    • D. 

      Incomplete dominance

  • 2. 
    The picture is an example of
    • A. 

      Epistasis

    • B. 

      Polygenic inheritance

    • C. 

      Pleiotropy

    • D. 

      Incomplete dominance

  • 3. 
    When an crossing an organism that's homozygous recessive for a single trait with heterozygote ,what is the chance of a producing an offspring with the Homozygous recessive phenotype?
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      75%

    • E. 

      100%

  • 4. 
    How many unique gametes could-be produced the through independent assortment by an individual with the genotype AaBbCCDdEE? 
    • A. 

      4

    • B. 

      8

    • C. 

      16

    • D. 

      64

  • 5. 
    Why did the F1 offspring of Mendel's classic pea cross always look like one of the two parental varieties?
    • A. 

      No genes interacted to produce the parental phenotype.

    • B. 

      Each allele affected phenotypic expression.

    • C. 

      The traits blended together during fertilization.

    • D. 

      One phenotype was completely dominant over another.

    • E. 

      Different genes interacted to produce the parental phenotype.

  • 6. 
    Which of the following differentiates between independent assortment and segregation?
    • A. 

      The law of independent assortment requires describing two or more genes relative to one another.

    • B. 

      The law of segregation requires describing two or more genes relative to one another.

    • C. 

      The law of segregation requires having two or more generations to describe.

    • D. 

      The law of independent assortment is accounted for by observations of prophase I.

    • E. 

      The law of segregation is accounted for by anaphase of mitosis.

  • 7. 
    A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete from this organism?
    • A. 

      Tt

    • B. 

      Hh

    • C. 

      HhTt

    • D. 

      T

    • E. 

      HT

  • 8. 
    Mendel accounted for the observation that traits which had disappeared in the F1 generation reappeared in the F2 generation by proposing that
    • A. 

      New mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1.

    • B. 

      The mechanism controlling the appearance of traits was different between the F1 and the F2 plants.

    • C. 

      Traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1.

    • D. 

      The traits were lost in the F1 due to dominance of the parental traits.

    • E. 

      Members of the F1 generation had only one allele for each trait, but members of the F2 had two alleles for each trait.

  • 9. 
    Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?
    • A. 

      Prophase I of meiosis

    • B. 

      Anaphase II of meiosis

    • C. 

      Metaphase I of meiosis

    • D. 

      Anaphase I of meiosis

    • E. 

      Anaphase of mitosis 

  • 10. 
    If doubly heterozygous SsNn cactuses were allowed to self-pollinate, the F2 would segregate in which of the following ratios?
    • A. 

      3 sharp-spined:1 spineless

    • B. 

      1 sharp-spined:2 dull-spined:1 spineless

    • C. 

      1 sharp-spined:1 dull-spined:1 spineless

    • D. 

      1 sharp-spined:1 dull-spined

    • E. 

      9 sharp-spined:3 dull-spined:4 spineless

  • 11. 
    A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N. Which of the following is a possible partial genotype for the son?
    • A. 

      IBIB

    • B. 

      IBIA

    • C. 

      Ii

    • D. 

      IBi

    • E. 

      IAIA

  • 12. 
    Skin color in a certain species of fish is inherited via a single gene with four different alleles. How many different types of gametes would be possible in this system?
    • A. 

      1

    • B. 

      2

    • C. 

      4

    • D. 

      8

    • E. 

      16

  • 13. 
    In one type cross of black × black, the results were as follows: 9/16 black 4/16 yellow 3/16 brown The genotype aabb must result in which of the following?
    • A. 

      Black

    • B. 

      Brown

    • C. 

      Yellow

    • D. 

      A lethal result

    • E. 

      White

  • 14. 
    The following question refers to the pedigree chart in the figure for a family, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle. What is the genotype of individual II-5?
    • A. 

      WW

    • B. 

      Ww

    • C. 

      Ww

    • D. 

      Ww or Ww

  • 15. 
    If a person has the genotype GgTtLL , how many possiblities are there concerning the genotype of the person's gametes?
    • A. 

      3

    • B. 

      4

    • C. 

      6

    • D. 

      2

  • 16. 
    When an organism has 2 identical alleles for a specific character , the organism is _________ for that character.
    • A. 

      Heterogenous

    • B. 

      Homologous

    • C. 

      Two answers are correct

    • D. 

      True Breeding

    • E. 

      Homozygous

  • 17. 
    Suppose a woman with the genotype GgTt and the phenotype is black hair and blue eyes, and a man with the phenotype black eyes and blonde hair with him being heterozygous for the black eyes phenotype, what is the probability of them having a black eyed black haired child? G,g --> Hair Colour T,t --> Eye Colour
    • A. 

      1/4

    • B. 

      1/16

    • C. 

      0

    • D. 

      1/1

    • E. 

      1/15

  • 18. 
    Suppose that a species of birds has 2 possible feather colours : Dominant W - white hair Recessive w - pink hair and that birds with white feathers turn pink when they eat crabs. When breeding two birds of the genotype Ww in an environment with only crabs as a source of food , the ratio of (pink:white) feathered birds will be in F1:
    • A. 

      1:1

    • B. 

      3:1

    • C. 

      0:1

    • D. 

      1:0

    • E. 

      None