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Q. No.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
Subtopic: Dihybrid Cross Analysis |
51%
From NCERT
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Identify an autosomal recessive inborn error of metabolism the effects of which can be completely overcome by regulating the diet of the affected individual:
| 1. | Cystic fibrosis | 2. | Huntington’s chorea |
| 3. | Albinism | 4. | Phenylketonuria |
Subtopic: Mendelian Disorders |
75%
From NCERT
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A gene is said to be dominant if:
| 1. | It expresses its effect only in the homozygous stage |
| 2. | It expresses only in heterozygous condition |
| 3. | It expresses both in homozygous and heterozygous conditions |
| 4. | It is never expressed in any condition |
Subtopic: Monohybrid Cross: Further Understanding |
88%
From NCERT
AIPMT - 2002
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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 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 |
66%
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 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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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 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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One of the crosses conducted by Mendel was a ‘test cross’. This cross can be used to:
| 1. | determine whether the individual is heterozygous or homozygous dominant |
| 2. | determine whether a gene is located on a sex chromosome or an autosome |
| 3. | differentiate between incomplete dominance and codominance |
| 4. | identify linkage between two genes |
Subtopic: Monohybrid Cross: 1 |
91%
From NCERT
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