Q. No.Consider the given two statements:
| Assertion(A): | In his monohybrid cross experiments on Garden Pea, Mendel found that the F1 always resembled either one of the parents, and that the trait of the other parent was not seen in them. |
| Reason(R): | There was blending of the unit factors in F1 plants. |
| 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: Monohybrid Cross: Further Understanding |
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The units of inheritance according to Mendel were ‘factors’. Today these factors are known as:
| 1. | Gametes | 2. | DNA |
| 3. | Genes | 4. | RNA |
Subtopic: Monohybrid Cross: Further Understanding |
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Genes that code for a pair of contrasting traits or slightly different forms of the same gene are known as:
| 1. | Alleles | 2. | Loci |
| 3. | Cistrons | 4. | Introns |
Subtopic: Monohybrid Cross: Further Understanding |
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A genetic cross between homozygous individuals but with different alleles for a single gene of interest is called as:
| 1. | A reciprocal cross | 2. | Monohybrid cross |
| 3. | Dihybrid cross | 4. | Test cross |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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What would you call an organism with two copies of the same allele?
1. homologous for the allele
2. heterologous for the allele
3. homozygous for the trait
4. heterozygous for the trait
1. homologous for the allele
2. heterologous for the allele
3. homozygous for the trait
4. heterozygous for the trait
Subtopic: Monohybrid Cross: Further Understanding |
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A test cross is done to find out:
| 1. | Fitness of an organism |
| 2. | Genotype of a plant expressing dominant phenotype |
| 3. | The suitable parents for a Mendelian Cross |
| 4. | The hidden genotypic ratio of F2 phenotypes |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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Subtopic: Monohybrid Cross: Further Understanding |
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Consider the given two statements:
| Assertion (A): | In a typical test cross, an organism showing a dominant phenotype (and whose genotype is to be determined) is crossed with the organism showing recessive phenotype. |
| Reason (R): | There is no need to carry out a test cross to determine the genotype of an organism showing the recessive phenotype. |
| 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: Monohybrid Cross: Further Understanding |
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Which statement naturally follows from the Mendel's Law of Dominance?
| 1. | Dominant alleles always express themselves in the phenotype |
| 2. | Recessive alleles always express themselves in the phenotype |
| 3. | Alleles segregate independently during gamete formation |
| 4. | Genes assort independently during meiosis |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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What is the F2 phenotypic ratio in cases of incomplete dominance?
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 1 : 2 : 1 | 4. | 1 : 1 |
Subtopic: Monohybrid Cross: Further Understanding |
91%
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