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Q. No.The number of types of gametes produced by a plant with the genotype AaBbCCDd will be:
1.
2
2.
4
3.
8
4.
16
Subtopic: Dihybrid Cross: Details |
84%
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The rediscovery of Mendel’s Laws is credited independently to:
| 1. | de Vries, Correns and von Tschermak |
| 2. | Sutton and Boveri |
| 3. | Garrod |
| 4. | Beadle and Tatum |
Subtopic: Chromosomal Basis of Inheritance: Further Considerations |
90%
From NCERT
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Drosophila melanogaster is a model organism for the study of genetics. The advantages of this organism include all the following except:
| 1. | A long life cycle |
| 2. | A large number of progeny produced by a single mating |
| 3. | Clear differentiation between sexes |
| 4. | Hereditary variation is easily seen with low-power microscopes |
Subtopic: Chromosomal Basis of Inheritance: Introduction |
89%
From NCERT
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The physiological basis of pleiotropy is:
| 1. | lack of independent assortment in linked genes |
| 2. | separation of homologous chromosomes at anaphase I in meiosis I |
| 3. | dominance is not an autonomous feature of an allele |
| 4. | inter-relationships of many metabolic pathways in the living organisms |
Subtopic: Polygenic Inheritance & Pleiotropy |
67%
From NCERT
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Gynecomastia is an important clinical feature seen in individuals with:
1. Klinefelter's syndrome
2. Turner’s syndrome
3. Oculocutaneous albinism
4. Down’s syndrome
1. Klinefelter's syndrome
2. Turner’s syndrome
3. Oculocutaneous albinism
4. Down’s syndrome
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
91%
From NCERT
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The number of recessive traits in a garden pea in the list given in the box below is:
| dwarf stem height, wrinkled seed shape, yellow seed color, yellow pod color, inflated pod shape, terminal flower position, violet flower color |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
Subtopic: Introduction to Genetics: 1 | Introduction to Genetics: 2 |
68%
From NCERT
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After analysis of results drawn from his experiments with pea plants, Mendel concluded:
| 1. | There is considerable genetic variation in garden peas. |
| 2. | Traits are inherited in discrete units, and are not the results of "blending." |
| 3. | Recessive genes occur more frequently in the F1 than do dominant ones. |
| 4. | Genes are composed of DNA. |
Subtopic: Law of Segregation and Law of Independent Assortment |
87%
From NCERT
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Total number of autosomes will be the same in:
| I. | Male and female humans |
| II. | Male and female birds |
| III. | Male and female Drosophila |
| IV. | Male and female grasshopper |
1. Only I, II, and III
2. Only I, II, and IV
3. Only II, III, and IV
4. I, II, III, and IV
Subtopic: Sex Determination |
64%
From NCERT
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The genetic change shown in the given figure shows the pathogenesis of:
| 1. | Phenylketonuria | 2. | Cystic fibrosis |
| 3. | Sickle cell anemia | 4. | Thalassemia |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
89%
From NCERT
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In a dihybrid cross between two pea plants with round and yellow seeds [heterozygous at both loci], the yellow and green color will segregate in a ratio:
1. 1 : 1
2. 3 : 1
3. 1 : 1 : 1 : 1
4. 9 : 3 : 3 : 1
1. 1 : 1
2. 3 : 1
3. 1 : 1 : 1 : 1
4. 9 : 3 : 3 : 1
Subtopic: Dihybrid Cross Analysis |
51%
From NCERT
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