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#plant genetics

9 public questions tagged with this topic.

Semi-dwarf rice varieties possess mutation in gene encoding:

GA20ox (C) is correct here. This is core Gibberellins: once you know the definition or pathway step, GA20ox is the clear fit. The wrong ones are A) GA3ox; B) GA2ox; D) GID1. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Overexpression of YUCCA genes results in:

Pick C: Tall plants. Thinking through Auxin Phytohormone step by step rules out the lookalikes and leaves Tall plants. Skip these: A) Dwarf plants; B) Reduced auxin; D) Early senescence. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

How many cryptochrome genes are present in Arabidopsis?

That points to C: Three. Compared with the other options, Three is the one that correctly describes the cryptochrome concept. The wrong ones are A) One; B) Two; D) Five. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Loss of APETALA2 results in floral organs:

Ca-St-St-Ca (B) is correct here. This is core PSS-Sec-E-Sensory biology: once you know the definition or pathway step, Ca-St-St-Ca is the clear fit. The wrong ones are A) Se-Pe-St-Ca; C) Se-Se-Ca-Ca; D) Pe-Pe-St-St. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Vernalization leads to stable repression of which flowering repressor gene?

Correct option is C, FLC. In PSS-Sec-E-Sensory biology problems like this, the accurate statement is FLC; the others are common mix-ups. Not these: A) FT; B) CO; D) FD. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

The mobile flowering signal florigen is encoded by which gene?

Answer: C) FT. For PSS-Sec-E-Sensory biology, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) FLC; B) FD; D) CO. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Which whorls are affected in agamous (AG) mutants?

That points to C: Stamens and carpels. Compared with the other options, Stamens and carpels is the one that correctly describes the ABC MODEL concept. The wrong ones are A) Sepals and petals; B) Petals and stamens; D) Sepals and carpels. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

ABC model was first developed using which model plant?

Arabidopsis thaliana (C) is correct here. This is core ABC MODEL: once you know the definition or pathway step, Arabidopsis thaliana is the clear fit. The wrong ones are A) Oryza sativa; B) Zea mays; D) Pisum sativum. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.