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Q. No.Assertion(A): In Thalassemia an abnormal myoglobin chain is synthesized due to a gene defect
Reason(R): \(\alpha-\)Thalassemia is controlled by genes HBAI and HBA2 on chromosome 16
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: Thalassemia |
From NCERT
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The number of correct statements from the given statements is:
1. 1
2. 2
3. 3
4. 4
| 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. |
2. 2
3. 3
4. 4
Subtopic: Introduction to Genetics: 2 |
84%
From NCERT
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Which of the following traits selected by Mendel for his artificial hybridisation experiments
was a recessive trait in Pisum sativum?
1. Yellow pod colour
2. Yellow seed colour
3. Inflated pod shape
4. Purple flower colour
was a recessive trait in Pisum sativum?
1. Yellow pod colour
2. Yellow seed colour
3. Inflated pod shape
4. Purple flower colour
Subtopic: Monohybrid Cross: Further Understanding |
85%
From NCERT
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Which of the following terms, as related to genetics, refers to having inherited the same versions (alleles)
of a genomic marker from each biological parent?
1. Homologous
2. Heterologous
3. Homozygous
4. Heterozygous
of a genomic marker from each biological parent?
1. Homologous
2. Heterologous
3. Homozygous
4. Heterozygous
Subtopic: Sex Determination |
71%
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Monohybrid cross can explain:
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
| I: | Law of dominance |
| II: | Law of segregation |
| III: | Law of independent assortment |
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: Monohybrid Cross: 1 |
83%
From NCERT
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In Mendelian Inheritance:
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
| 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. |
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%
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Consider the two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| 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. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Law of Segregation |
91%
From NCERT
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In ABO blood group system, the number of alleles, the number of genotypes and the number of phenotypes possible respectively is:
1. 3, 4 and 6
2. 3, 6 and 4
3. 2, 4 and 6
4. 2, 6 and 4
1. 3, 4 and 6
2. 3, 6 and 4
3. 2, 4 and 6
4. 2, 6 and 4
Subtopic: Co-dominance |
84%
From NCERT
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Consider the given two statements:
1. Both Assertion and Reason are true and Reason correctly explains Assertion
2. Both Assertion and Reason are true but Reason does not correctly explain Assertion
3. Assertion is true but Reason is false
4. Assertion is false but Reason is true
| Assertion: | Multiple alleles can be found only when population studies are made. |
| Reason: | Multiple alleles for the same gene are always located on heterologous chromosomes. |
2. Both Assertion and Reason are true but Reason does not correctly explain Assertion
3. Assertion is true but Reason is false
4. Assertion is false but Reason is true
Subtopic: Genic Balance Theory |
75%
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In pea seeds, starch synthesis in pea seeds is controlled by one gene. A plant with genotype Bb will produce:
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
Subtopic: Monohybrid Cross: 1 |
81%
From NCERT
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