MCQs on Punnett Square Multiple Choice Questions

MCQs on Punnett Square Multiple Choice Questions

Punnett Square – Introduction


Reginald Punnett was the first among English geneticists, who devised the “Punnett Square” to depict the number and variety of genetic combinations, and had a role in shaping the Hardy-Weinberg law. Punnett along with William Bateson discovered “coupling” or gene linkage. A Punnett square in zoology is actually a graphical representation of an offspring’s possible genotypes, arising from a particular cross or breeding event. A Punnett square requires knowledge of the genetic composition of the parents. The various possible combinations of parental gametes are encapsulated in a tabular form. Therefore, in the table, each box represents one fertilization event. All the MCQs on Punnett Square Multiple Choice Questions are published according to the new study syllabus for academic year 2021-22.


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All of these objective questions on “Punnett Squarein Zoology MCQs are preferably for test / interview preparation for BSc, MSc, BS (Hons), NTS, FPSC, PPSC, PTS, CSS, MDCAT, ECAT, MCAT and all other competitive examination for foreign study including overseas student, also we are waiting for yours positive feedback.


Punnett Square Multiple Choice Quiz Questions and Answers


𓇼 Introduction:

Q1. Who devised the Punnett square?

  1. Reginald Punnett
  2. William Bateson
  3. Both a and b

Answer: a

Q2. Which of the following is used to predicts the result of the crosses?

  1. Genes and Alleles
  2. True breeds
  3. Dominant and recessive alleles
  4. Punnett square

Answer: d

Q3. The first step in Punnett square is used to determine the kinds of ________.

  1. genes
  2. alleles
  3. gametes
  4. phenotypes

Answer: c

Q4. One of the two axes of a square is designated for each________.

  1. parent
  2. offspring
  3. gene
  4. allele

Answer: a

Q5. The different kinds of _______ are listed along the axis.

  1. genes
  2. alleles
  3. gametes
  4. none

Answer: c

Q6. Which are combined in the interior of the square?

  1. Gametes
  2. Alleles
  3. Both a and b
  4. None

Answer: a


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Q7. The two phenotypes of the F2 generation shows 3:1 in Punnett square.            True/false

Answer: True

Q8. Which ratio expresses the results of a cross physically in Punnett square?

  1. Genotypic ratio
  2. Phenotypic ratio
  3. Both a and b
  4. None

Answer: b

Q9. The ratio which expresses the results of a cross according to the relative numbers of progeny in each genotypic category is: 

  1. Genotypic ratio
  2. Phenotypic ratio
  3. Both a and b
  4. None

Answer: a

Q10. The Punnett square has explained in another way the F2 results in figure.      True/False

Answer: True


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Q11. What is the ratio of wild-type flies to vestigial-winged flies in the F2 generation in Punnett square?

  1. 1:3 (wild-vestigial) (1 vg+ vg : 3 vg vg)
  2. 3:1 (wild-vestigial) (1 vg+ vg+: 2vg+ vg: 1 vg vg)
  3. None

Answer: b

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