Plant Genetics – Section 1

6. During meiosis crossing over takes place at

A. zygotene stage
B. diplotene stage
C. diakinesis stage
D. pachytene stage

Correct Answer: D. pachytene stage

7. Which of the following transposable elements are not found in plants?

A. Ac
B. Tam3
C. L1
D. All are found

Correct Answer: C. L1

8. A plasmid used to introduce BT toxin into a plant cell

A. carries an antibiotic resistance gene that makes the plant resistant to antibiotics
B. causes the plant to produce opines
C. is toxic for the plant cell
D. carries a bacterial gene with a plant promoter

Correct Answer: D. carries a bacterial gene with a plant promoter

9. The homologous chromosomes follow the process of synopsis in the

A. leptotene
B. zygotene
C. pachytene
D. diplotene

Correct Answer: B. zygotene

10. When F1 plants are crossed with homozygous recessive plants, it is known as

A. test cross
B. recessive cross
C. criss-cross
D. para-cross

Correct Answer: A. test cross

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