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Q. No.
Consider the given two statements:
Assertion(A): The pattern of inheritance of Mendelian disorders can be traced in a family by the pedigree analysis.
Reason(R): Mendelian disorders are mainly determined by alteration or mutation in a single gene with complete dominance.
 
1. (A) is False but (R) is True.
2. Both (A) and (R) are True and (R) is the correct explanation of (A).
3. Both (A) and (R) are True but (R) is not the correct explanation of (A).
4. (A) is True but (R) is False.
Subtopic:  Mendelian Disorders |
From NCERT
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Mendelian disorders are mainly determined by:

1. Alteration or mutation in a single gene.
2. Chromosomal gross structural changes.
3. Recombination between linked genes.
4. Jumping genes
Subtopic:  Mendelian Disorders |
 83%
From NCERT
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The sickle cell trait provides a survival advantage against:
1. Malaria
2. HIV
3. Covid 19
4. Swine flu
Subtopic:  Mendelian Disorders |
 90%
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What is the mode of inheritance of phenylketonuria?

1.Autosomal recessive2.Autosomal dominant
3.Sex linked recessive4.Sex linked dominant

Subtopic:  Mendelian Disorders |
 90%
From NCERT
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In cases of Phenylketonuria:

1. The affected individual lacks an enzyme that converts the amino acid tyrosine into phenylalanine.
2. The affected individual makes an enzyme that converts the amino acid tyrosine into phenylalanine.
3. The affected individual makes an enzyme that converts the amino acid phenylalanine into tyrosine.
4. The affected individual lacks an enzyme that converts the amino acid phenylalanine into tyrosine.
Subtopic:  Mendelian Disorders |
 75%
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Consider the given two statements:
Assertion(A): Patients of phenylketonuria can show mental retardation.
Reason(R): Phenylpyruvic acid can get accumulated in the brain of the patients suffering from phenylketonuria.
 
1. (A) is True but (R) is False
2. (A) is False but (R) is True
3. Both (A) and (R) are True and (R) is the correct explanation of (A)
4. Both (A) and (R) are True but (R) is not the correct explanation of (A)
Subtopic:  Mendelian Disorders |
 86%
From NCERT
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Consider the given two statements:
Assertion(A): A simple treatment for children suffering from phenylketonuria can be diet restrictions.
Reason(R): Phenylalanine is an essential amino acid.
 
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. (A) is False but (R) is True.
Subtopic:  Mendelian Disorders |
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A man and a woman carry an allele for Phenylketonuria. Their first progeny, a boy, is affected by the disorder. What is the probability that their second progeny might also be affected by the disorder?
1. None, if the second child is a female
2. None, if the second child is a male
3. 2/3
4. 1/4
Subtopic:  Mendelian Disorders |
 76%
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Consider the following two statements:

Statement I: Phenylketonuria is an autosomal recessive disorder
Statement II: Phenylketonuria is an inborn error of metabolism

1. Only Statement I is correct
2. Only Statement II is correct
3. Both Statement I and Statement II are correct 
4. Both Statement I and Statement II are incorrect

Subtopic:  Mendelian Disorders |
 89%
From NCERT
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