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#homeotic genes

5 public questions tagged with this topic.

ABC MODEL+PYQS

If all five homeotic genes are mutated, flower develops into:

Leaf-like structures (C) is correct here. This is core ABC MODEL: once you know the definition or pathway step, Leaf-like structures is the clear fit. The wrong ones are A) Extra petals; B) Stamens only; D) Inflorescence. 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.

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ABC MODEL+PYQS

Homeotic genes mainly encode:

Go with C — Transcription factors. Under ABC MODEL, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) Structural proteins; B) Enzymes; D) Hormones. When two options sound similar, choose the one that matches the textbook definition most tightly.

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

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ABC MODEL+PYQS

Mutation in class B genes results in absence of:

Pick B: Petals and stamens. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Petals and stamens. Skip these: A) Sepals and petals; C) Stamens and carpels; D) Sepals only. 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.

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ABC MODEL+PYQS

Class A and Class C genes show which interaction?

Pick C: Mutual antagonism. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Mutual antagonism. Skip these: A) Synergistic; B) Independent; D) Co-dominance. 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.

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ABC MODEL+PYQS

Class C gene in Arabidopsis is:

Correct option is D, AGAMOUS. In ABC MODEL problems like this, the accurate statement is AGAMOUS; the others are common mix-ups. Not these: A) AP1; B) AP2; C) AP3. 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.

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