Q. No.
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In complete dominance, the recessive allele with respect to the dominant allele:
1. Produces no product
2. Produces a different product
3. Produces half the product
4. Produces no product or a non-functional product
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Genes tightly linked on the same chromosome show:
| 1. | Very high recombination | 2. | Independent assortment |
| 3. | Very low recombination | 4. | 50 % recombination |
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Which of the following amino acid substitution in the beta chain of the haemoglobin molecule leads to the development of sickle cell anaemia?
1. Arginine by tyrosine
2. Tyrosine by phenylalanine
3. Valine by Glutamic acid
4. Glutamic acid by Valine
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In Phenylketonuria,
| I. | Phenylpyruvic acid and other derivatives are accumulated in the brain resulting in mental retardation. |
| II. | These are also excreted through urine because of their poor absorption by the kidney. |
| 1. | Only I is correct | 2. | Only II is correct |
| 3. | Both are correct | 4. | Both are incorrect |
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The F1 progeny in monohybrid crosses by Mendel resembled:
| 1. | The parent exhibiting the dominant trait completely |
| 2. | The parent exhibiting recessive trait comp |
| 3. | The parent exhibiting the dominant trait partly |
| 4. | The parent exhibiting recessive traits partly |
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Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and this phenomenon is known as:
| 1. | Aneuploidy | 2. | Translocation |
| 3. | Polyploidy | 4. | Inversion |
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Theoretically, what can be the maximum number of alleles a particular gene can have?
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | Any number |
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Which of the following is not true for the Law of Dominance given by Mendel?
| 1. | Characters are controlled by discrete units called factors. |
| 2. | Factors occur in pairs. |
| 3. | In a dissimilar pair of factors, one member of the pair dominates the other. |
| 4. | The alleles show blending at the time of fertilization. |
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Monosomy means:
| 1. | Lack of one pair of chromosomes |
| 2. | Lack of one of any one pair of chromosome |
| 3. | Presence of an extra chromosome |
| 4. | Presence of an extra set of chromosomes |
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