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Q. No.Assertion : Phenylketonuria is a recessive hereditary disease caused by the body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.
Reason : It results in the presence of phenylalanine acid in the urine.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Mendelian Disorders |
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NEET 2025 - Target Batch
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Assertion : In honey bee, life history shows natural and complete parthenogenesis.
Reason : In honey bee, both drones and workers are parthenogenetically developed.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Sex Determination |
54%
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NEET 2025 - Target Batch
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Assertion: Dominance is not always an autonomous feature of gene or its product.
Reason: Occasionally a single gene product may produce more than one effects.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Monohybrid Cross: 1 | Polygenic Inheritance & Pleiotropy |
58%
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NEET 2025 - Target Batch
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In the following questions a statement of assertion (A) is followed by a statement of reason (R).
| Assertion (A): | Organisms lacking one complete chromosome are called monosomics. |
| Reason (R): | Down’s syndrome is an example of monosomy. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Non - Disjunction & Aneuploidy | Sex Aneuploidy - Turner & Klinefelter Syndrome |
69%
From NCERT
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Q. No.
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