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Q. No.The number of correct statements from the given statements is:
I:
Gregor Mendel, conducted hybridisation experiments on garden peas for seven years (1856-1863) and proposed the laws of inheritance in living organisms.
II:
During Mendel’s investigations into inheritance patterns it was for the first time that statistical analysis and mathematical logic were applied to problems in biology.
III:
His experiments had a large sampling size, which gave greater credibility to the data that he collected.
IV:
Mendel investigated characters in the garden pea plant that were manifested as two opposing traits.
1. 1
2. 2
3. 3
4. 4
2. 2
3. 3
4. 4
Subtopic: Introduction to Genetics: 2 |
84%
From NCERT
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In Mendelian Inheritance:
| I: | Some alleles are dominant while others are recessive; an organism with at least one dominant allele will display the effect of the dominant allele. |
| II: | During gamete formation, the alleles for each gene segregate from each other so that each gamete carries only one allele for each gene. |
| III: | Genes of different traits can segregate independently during the formation of gametes. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Dihybrid Cross Analysis |
86%
From NCERT
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Consider the two statements:
| I: | In Incomplete Dominance, F1 has a phenotype that does not resemble either of the two parents and is in between the two. |
| II: | In Co-Dominance, F1 has a phenotype that resembles both the parents. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Law of Segregation and Law of Independent Assortment |
91%
From NCERT
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Three Scientists independently rediscovered Mendel’s results on the inheritance of characters in 1900. They were:
1. Avery–MacLeod–McCarty
2. de Vries, Correns and von Tschermak
3. Nirenberg, Mathei, Khorana
4. Paul Berg, Boyer and Cohen
1. Avery–MacLeod–McCarty
2. de Vries, Correns and von Tschermak
3. Nirenberg, Mathei, Khorana
4. Paul Berg, Boyer and Cohen
Subtopic: Chromosomal Basis of Inheritance: Introduction |
91%
From NCERT
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Consider the two statements:
| Statement I: | The fruit fly is a popular choice as a model organism in genetics. |
| Statement II: | It has a very long generation time and low fecundity (females lay only a few eggs in life time). |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Chromosomal Basis of Inheritance: Further Considerations |
90%
From NCERT
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Consider the given two statements:
| Assertion (A): | A sex linked recessive disorders is expected to be more common in males than in females. |
| Reason (R): | Males are hemizygous for sex chromosomes. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Sex Linked Recessive Inheritance |
70%
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What is not true regarding Phenylketonuria?
| 1. | It is an inborn error of metabolism. |
| 2. | It is inherited as an autosomal recessive trait. |
| 3. | The affected individual lacks an enzyme that converts the amino acid tyrosine into phenylalanine. |
| 4. | Accumulation of phenylpyruvic acid in brain results in mental retardation. |
Subtopic: Mendelian Disorders |
82%
From NCERT
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Consider the two statements:
| Statement I: | Thalassemia is a qualitative problem of synthesising an incorrectly functioning globin. |
| Statement II: | Sickle cell anaemia is a quantitative problem of synthesising too few globin molecules. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Mendelian Disorders: Thalassemia |
82%
From NCERT
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Turner’s Syndrome:
| I: | is an aneuploidy |
| II: | causes infertility in affected females |
| III: | does not affect the development of secondary sexual characters in affected females |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
82%
From NCERT
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Consider the given two statements:
| Assertion (A): | In a dissimilar situation, the chance of a gamete receiving the dominant allele of a given gene is much higher than receiving the recessive allele. |
| Reason (R): | Recessive alleles are always present in less number than a dominant allele in the gene pool. |
| 1. | (A) is True but (R) is False |
| 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 False and (R) is also False |
Subtopic: Monohybrid Cross: 1 |
59%
From NCERT
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