Plant Genetics(Biotechnology ) Questions and Answers

Question 1. When an organism has a life cycle with alternation of generations, the haploid generation is the
  1.    zygote
  2.    sporophyte
  3.    gametophyte
  4.    gamete
Explanation:-
Answer: Option C. -> gametophyte
Question 2. In the meiotic cell divison in daughter cells are produced by two successive division in which
  1.    first division is equational, second is reductional
  2.    both divisions are equational
  3.    first division is reductional and second is equational
  4.    both divisions are reductional
Explanation:-
Answer: Option A. -> first division is equational, second is reductional
Question 3. In case of incomplete dominance, the phenotypic ratio of a monohybrid cross will be
  1.    1:3:1
  2.    3:1:1
  3.    1:2:1
  4.    1:1:2
Explanation:-
Answer: Option C. -> 1:2:1
Question 4. When do kinetochore microtubules pull chromosomes towards opposite spindle poles?
  1.    In anaphase A
  2.    In metaphase
  3.    In telophase
  4.    In anaphase B
Explanation:-
Answer: Option A. -> In anaphase A
Question 5. What is the approximate size (in kb) of the melon mitochondrial genome?
  1.    600 kilobase
  2.    2400 kilobase
  3.    1200 kilobase
  4.    3000 kilobase
Explanation:-
Answer: Option B. -> 2400 kilobase
Question 6. When F1 plants are crossed with homozygous recessive plants, it is known as
  1.    para-cross
  2.    criss-cross
  3.    recessive cross
  4.    test cross
Explanation:-
Answer: Option D. -> test cross
Question 7. A plasmid used to introduce BT toxin into a plant cell
  1.    causes the plant to produce opines
  2.    carries an antibiotic resistance gene that makes the plant resistant to antibiotics
  3.    is toxic for the plant cell
  4.    carries a bacterial gene with a plant promoter
Explanation:-
Answer: Option D. -> carries a bacterial gene with a plant promoter
Question 8. The homologous chromosomes follow the process of synopsis in the
  1.    diplotene
  2.    zygotene
  3.    leptotene
  4.    pachytene
Explanation:-
Answer: Option B. -> zygotene
Question 9. During meiosis crossing over takes place at
  1.    diakinesis stage
  2.    zygotene stage
  3.    diplotene stage
  4.    pachytene stage
Explanation:-
Answer: Option D. -> pachytene stage
Question 10. Which of the following transposable elements are not found in plants?
  1.    L1
  2.    Tam3
  3.    All are found
  4.    Ac
Explanation:-
Answer: Option A. -> L1
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