Q.104 Botany ⭐ 360° Option Elimination Active

NEET 2024 Botany Question 104 Solution

Topic: Principles of Inheritance and Variation · Official NTA Booklet Code T1

Question

Which one of the following can be explained on the basis of Mendel's Law of Dominance? A. Out of one pair of factors one is dominant and the other is recessive. B. Alleles do not show any expression and both the characters appear as such in F, generation. C. Factors occur in pairs in normal diploid plants. D. The discrete unit controlling a particular character is called factor. E. The expression of only one of the parental characters is found in a monohybrid cross. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (4) : A, C, D and E only

📚 Principles of Inheritance and Variation Medium

📋 Given Parameters & Problem Setup

Principle Mendel's Law of Dominance

Candidate Statements A: Dominant/recessive pair; B: Non-blending in F2; C: Factors occur in pairs; D: Discrete factors; E: One parental character expressed in F1

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The 30-Second Exam Hall Shortcut: ⚡ Dominance vs Segregation Dissection

⏱️ Save ~40 seconds

Statement B describes non-blending and recovery of both alleles in F2, which is the Law of Segregation (Purity of Gametes)! Statements A, C, D, and E are the exact postulates of the Law of Dominance!

1 Check Statement B: "Alleles do not show any expression and both characters appear as such in F2 generation" refers to non-blending / segregation.

2 Eliminate any option containing B: Option 1 (B, C, D), Option 2 (all), Option 3 (A, B, C) are all eliminated!

3 Only Option (4) A, C, D and E only remains!

4 Solved in under 10 seconds through systematic elimination!

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Principles of Inheritance and Variation (Law of Dominance Postulates)

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Identify NCERT Postulates of the Law of Dominance

Mendel stated the Law of Dominance using three core assertions: (i) Characters are controlled by discrete units called factors (Statement D). (ii) Factors occur in pairs (Statement C). (iii) In a dissimilar pair of factors, one member dominates the other (Statement A). It also explains the expression of only one parental character in F1 (Statement E) and the 3:1 ratio in F2.

Step 2

Analyze Statement B

Statement B asserts that alleles do not show blending and both characters are recovered as such in F2. This is the definition and evidence for the Law of Segregation (purity of gametes), not the Law of Dominance.

Step 3

Formulate Correct Set

Statements A, C, D, and E belong to the Law of Dominance, making Option (4) the correct answer.

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 (1)

✗ Incorrect

Verdict & Scientific Reason:

Statement B represents the Law of Segregation, not the Law of Dominance.

⚠️

Student Fallacy (Why candidates pick this trap): Statement B represents the Law of Segregation, not the Law of Dominance.

2 (2)

✗ Incorrect

Verdict & Scientific Reason:

Includes Statement B which is attributed to the Law of Segregation.

⚠️

Student Fallacy (Why candidates pick this trap): Includes Statement B which is attributed to the Law of Segregation.

3 (3)

✗ Incorrect

Verdict & Scientific Reason:

Includes Statement B and omits valid postulates D and E.

⚠️

Student Fallacy (Why candidates pick this trap): Includes Statement B and omits valid postulates D and E.

4 (4)

✓ 100% Correct

Verdict & Scientific Reason:

Correctly identifies all statements representing postulates and explanations of the Law of Dominance while excluding segregation.

💡

Why this is airtight: None.

⚠️

NTA Trap Alert: Mixing Up the Two Mendelian Laws

Assuming all monohybrid cross observations are covered under the Law of Dominance.

🛡️ How to avoid the -1 mark: Remember: Non-blending and recovery of recessive trait in F2 proves the Law of Segregation (Alleles segregate during gamete formation).

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Core NEET Syllabus Standard

Biology Core Botany · Principles of Inheritance and Variation Standard Benchmark

Core Scientific Principle Tested:

"Law of Dominance: (i) Characters are controlled by discrete units called factors. (ii) Factors occur in pairs. (iii) In a dissimilar pair of factors one member of the pair dominates (dominant) the other (recessive)."

Syllabus Focus: Postulates of Mendel's Law of Dominance

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2024 Botany Question 104 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Dominance vs Segregation Dissection

Step-by-Step Rigorous Workflow & Mathematical Proof

Identify NCERT Postulates of the Law of Dominance

Analyze Statement B

Formulate Correct Set

360° Option Elimination Engine Key Feature

NTA Trap Alert: Mixing Up the Two Mendelian Laws

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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