Genetics(Life Sciences ) Questions and Answers

Question 1. The Phenomenon of two or more than two genes affecting the expression of each other is called ___________
  1.    Crossing over
  2.    Pairing
  3.    Gene interaction
  4.    Linkage
Explanation:-
Answer: Option C. -> Gene interaction
Answer: (c).Gene interaction
Question 2. Which of the following ratio shows complementary gene interaction?
  1.    9:7
  2.    15:1
  3.    1:2:1
  4.    9:3:3:1
Explanation:-
Answer: Option A. -> 9:7
Answer: (a).9:7
Question 3. What is epistasis?
  1.    Type of linkage
  2.    Masking or modifying gene effect
  3.    Upper portion of a chromosome
  4.    Group of genes
Explanation:-
Answer: Option B. -> Masking or modifying gene effect
Answer: (b).Masking or modifying gene effect
Question 4. Which of the following does not show Mendel’s law of inheritance?
  1.    Masking gene interaction
  2.    Epistasis
  3.    Supplementary gene interaction
  4.    Codominance
Explanation:-
Answer: Option D. -> Codominance
Answer: (d).Codominance
Question 5. Crossing of two white flowers gives a colored flower, this shows complementary gene interaction.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 6. QTL is the chromosomal site at which a group of genes affecting quantitative traits located.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 7. Which of the following factor does not contribute to quantitative traits?
  1.    Polygenes
  2.    Environmental
  3.    Genetic
  4.    Carbohydrate content
Explanation:-
Answer: Option D. -> Carbohydrate content
Answer: (d).Carbohydrate content
Question 8. Traits which show continuous variation is referred as ___________
  1.    Genetic disorders
  2.    Phenotypic variation
  3.    Quantitative traits
  4.    Qualitative traits
Explanation:-
Answer: Option C. -> Quantitative traits
Answer: (c).Quantitative traits
Question 9. Who explained the multifactorial hypothesis?
  1.    Ronald Fisher
  2.    Darwin
  3.    Mendel
  4.    Nilsson-Ehle
Explanation:-
Answer: Option A. -> Ronald Fisher
Answer: (a).Ronald Fisher
Question 10. Which of the following describes the dissimilarity in the traits due to the variation in genetic factors?
  1.    Polygenic
  2.    Heritability
  3.    Quantitative trait loci
  4.    Maternal effect
Explanation:-
Answer: Option B. -> Heritability
Answer: (b).Heritability
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