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Q. No.In Antirrhinum majus, how many of the given cross will produce all progeny exhibiting similar phenotypes [symbols carry usual meanings]?
1. 1
2. 2
3. 3
4. 4
| I: | \(Rr \times Rr\) | II: | \(Rr \times rr\) |
| III: | \(RR \times rr\) | IV: | \(Rr \times RR\) |
1. 1
2. 2
3. 3
4. 4
Subtopic: Monohybrid Cross: Further Understanding |
From NCERT
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Genetics, an important branch of biology, is best defined as:
| 1. | The study of the transmission of traits from parent to offspring. |
| 2. | The study of genes and traits defined by genes. |
| 3. | The study of DNA. |
| 4. | The study of variation between members of a species. |
Subtopic: Introduction to Genetics: 1 |
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Consider the given two statements:
| Assertion (A): | In a dissimilar situation, the chance of a gamete receiving the dominant allele of a given gene is much higher than receiving the recessive allele. |
| Reason (R): | Recessive alleles are always present in less number than a dominant allele in the gene pool. |
| 1. | (A) is True but (R) is False |
| 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 False and (R) is also False |
Subtopic: Monohybrid Cross: 1 |
59%
From NCERT
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Genes of different traits can segregate independently during the formation of gametes. This is the concept of:
1. Dominance
2. Segregation
3. Independent assortment
4. Linkage
1. Dominance
2. Segregation
3. Independent assortment
4. Linkage
Subtopic: Dihybrid Cross: General Consideration | Dihybrid Cross: Details |
65%
From NCERT
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The genotype of a husband is IAIB and that of a wife is IAi. How many different genotypes and phenotypes are possible in their progeny?
1. 2 genotypes; 3 phenotypes
2. 3 genotypes; 4 phenotypes
3. 4 genotypes; 4 phenotypes
4. 4 genotypes; 3 phenotypes
1. 2 genotypes; 3 phenotypes
2. 3 genotypes; 4 phenotypes
3. 4 genotypes; 4 phenotypes
4. 4 genotypes; 3 phenotypes
Subtopic: Polygenic Inheritance & Pleiotropy |
85%
From NCERT
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The number of correct statements from the given statements is:
| I: | Gregor Mendel, conducted hybridisation experiments on garden peas for seven years (1856-1863) and proposed the laws of inheritance in living organisms. |
| II: | During Mendel’s investigations into inheritance patterns it was for the first time that statistical analysis and mathematical logic were applied to problems in biology. |
| III: | His experiments had a large sampling size, which gave greater credibility to the data that he collected. |
| IV: | Mendel investigated characters in the garden pea plant that were manifested as two opposing traits. |
1. 1
2. 2
3. 3
4. 4
2. 2
3. 3
4. 4
Subtopic: Introduction to Genetics: 2 |
84%
From NCERT
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What percentage of pea plants would be homozygous for their trait in the F2 generation, when tall F1 heterozygous pea plants are selfed?
| 1. | 25 | 2. | 50 |
| 3. | 75 | 4. | 100 |
Subtopic: Monohybrid Cross: 1 |
81%
From NCERT
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What type of characters can easily be studied in the pedigree analysis in human beings?
| 1. | quantitative trait | 2. | Mendelian trait |
| 3. | polygenic trait | 4. | maternal trait |
Subtopic: Pedigree Analysis: Problem Solving | Pedigree Analysis: More Examples |
87%
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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Consider the given two statements:
| Assertion (A): | The sickle cell anaemia allele is common in certain African populations. |
| Reason (R): | It provides a survival advantage against malaria. |
| 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: Mendelian Disorders: Sickle Cell Anemia |
62%
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