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Q. No.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
Subtopic: Co-dominance |
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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: Co-dominance |
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When the two genes in a dihybrid cross were situated on the same chromosome:
| 1. | the proportion of parental gene combinations were much lower than the non-parental type. |
| 2. | the proportion of parental gene combinations were much higher than the non-parental type. |
| 3. | the proportion of parental gene combinations were equal to the non-parental type. |
| 4. | only the parental gene combinations were seen in the progeny. |
Subtopic: Linkage |
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Consider the given two statements:
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
| Statement I: | Besides the involvement of multiple genes polygenic inheritance also takes into account the influence of environment. |
| Statement II: | In a polygenic trait the phenotype reflects the contribution of each allele, i.e., the effect of each allele is additive. |
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: Polygenic Inheritance & Pleiotropy |
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Consider the given two statements:
| Assertion (A): | Unlike sickle cell anaemia, thalassemia is essentially a quantitative disorder with respect to production of haemoglobin in affected individuals. |
| Reason (R): | The defect could be due to either mutation or deletion which ultimately results in reduced rate of synthesis of one of the globin chains (alpha and beta chains) that make up haemoglobin. |
| 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: Thalassemia |
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Identify the incorrect statement:
| 1. | Mendel found the phenotype of the F1 heterozygote Tt to be exactly like the TT parent in appearance. |
| 2. | He proposed that in a pair of dissimilar factors, one dominates the other. |
| 3. | It is convenient (and logical) to use the capital and lower case of an alphabetical symbol to remember this concept of dominance and recessiveness. |
| 4. | It is convenient (and logical) to use the capital and lower case of different alphabets symbol to remember this concept of dominance and recessiveness. |
Subtopic: Monohybrid Cross: Further Understanding |
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Genes that are located on the same chromosome are called as:
| 1. | Duplicate genes | 2. | Pseudo genes |
| 3. | Linked genes | 4. | Codominant genes |
Subtopic: Understanding Linkage |
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Mendel worked with seven characteristics of pea plants include all the following except:
1. pod shape and color
2. seed shape and color
3. flower position and color
4. girth of plant and shade of green in leaves
1. pod shape and color
2. seed shape and color
3. flower position and color
4. girth of plant and shade of green in leaves
Subtopic: Dominance Deviation from Mendel: 1 | Dominance Deviation from Mendel: 2 |
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Which of the following codons leads to the insertion of valine in the peptide during translation?
| 1. | G G G | 2. | A A G |
| 3. | G A A | 4. | G U G |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
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| Assertion (A): | Male honeybees are haploid. |
| Reason (R): | Female honeybees are diploid. |
| 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, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Sex Determination |
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