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Q. No.The mechanism of sex determination:
I:
is XX/XO male heterogamety in Grasshoppers
II:
is ZZ/ZW female heterogamety in birds
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Sex Determination |
93%
From NCERT
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A monohybrid cross between an individual exhibiting recessive phenotype and an individual with an unknown genotype but exhibiting dominant phenotype results in all offspring showing the dominant phenotype. What is the genotype of the second individual?
| 1. | Homozygous dominant | 2. | Heterozygous |
| 3. | Homozygous recessive | 4. | Cannot be determined |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
81%
From NCERT
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In a cross between two individuals with the genotype AaBb and Aabb, the probability of having an offspring with the genotype Aabb will be:
1. 1/16
2. 1/8
3. 1/4
4. 1/2
1. 1/16
2. 1/8
3. 1/4
4. 1/2
Subtopic: Dihybrid Cross Analysis |
66%
From NCERT
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Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Each individual has multiple copies [more than two] of the same allele. |
| II: | More than two alleles exist for a particular gene in a population for multiple allelic traits. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Monohybrid Cross: Further Understanding |
64%
From NCERT
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The unit for measurement of the distance between two linked genes on a chromosome is:
1. Centimorgans
2. Base pairs
3. Micrometers
4. Angstroms
1. Centimorgans
2. Base pairs
3. Micrometers
4. Angstroms
Subtopic: Chromosomal Basis of Inheritance: Further Considerations | Linkage |
79%
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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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Consider the two statements:
| Statement I: | Mendel’s law of segregation can also be called as law of purity of gametes. |
| Statement II: | Gametes have two complete sets of chromosomes in plants. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
65%
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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The number of types of gametes produced by a plant with the genotype AaBbCC [assume independent assortment] will be:
| 1. | 4 | 2. | 6 |
| 3. | 8 | 4. | 64 |
Subtopic: Dihybrid Cross Analysis |
87%
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A gene has seven alleles. The number of possible genotypic combinations will be:
| 1. | 7 | 2. | 8 |
| 3. | 28 | 4. | 56 |
Subtopic: Dihybrid Cross Analysis |
69%
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