Q. No.A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
| 1. | Blood group B | 2. | Blood group AB |
| 3. | Blood group O | 4. | Blood group A |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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What is the concept of dominance in genetics?
| 1. | Dominance refers to a trait that is expressed only in the presence of two identical alleles. |
| 2. | Dominance refers to the interaction between two alleles, where one allele masks the expression of the other in a heterozygous condition. |
| 3. | Dominance refers to the equal expression of both alleles in a heterozygous organism. |
| 4. | Dominance refers to the blending of traits from both alleles in the offspring. |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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A man of which of the following blood groups could not be the father of a group O child?
1. A
2. B
3. O
4. AB
Subtopic: Monohybrid Cross: Further Understanding |
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What is the F2 genotypic ratio in cases of incomplete dominance?
| 1. | 1 : 1 | 2. | 3 : 1 |
| 3. | 1 : 2 : 1 | 4. | 1 : 1 |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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What is the correct description of genes and alleles?
| 1. | Genes are units of inheritance containing information for traits, and alleles are different genes coding for unrelated traits. |
| 2. | Genes are the physical carriers of hereditary material, while alleles are identical copies of the same gene. |
| 3. | Genes are units of inheritance containing information for traits, and alleles are slightly different forms of the same gene that code for contrasting traits. |
| 4. | Genes and alleles are unrelated entities with no role in contrasting traits. |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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A man has type AB blood and he marries a woman with type O blood. Two children are born to the couple and they also adopted one child. If child 1 has type A blood, child 2 has type B blood, and child 3 has type O blood, which child was adopted?
| 1. | Child 1 | 2. | Child 2 |
| 3. | Child 3 | 4. | Cannot be determined |
Subtopic: Monohybrid Cross: Further Understanding |
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In incomplete dominance, a heterozygous individual shows an intermediate phenotype. If a red-flowered plant (RR) is crossed with a white-flowered plant (rr), what will be the phenotypic ratio of offspring in the F₂ generation?
1. 3:1 (red:white)
2. 1:2:1 (red:pink:white)
3. 9:3:3:1 (red:pink:white:spotted)
4. 1:1 (red:pink)
1. 3:1 (red:white)
2. 1:2:1 (red:pink:white)
3. 9:3:3:1 (red:pink:white:spotted)
4. 1:1 (red:pink)
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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An organism with two identical alleles is ___________ for the trait.
| 1. | Dominant | 2. | Hybrid |
| 3. | Heterozygous | 4. | Homozygous |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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A plant with genotype Rr is self pollinated. The percentage of heterozygous individuals obtained will be
| 1. | 100 | 2. | 75 |
| 3. | 50 | 4. | 25 |
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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A cross that involves the breeding of a phenotypically dominant individual with a phenotypically recessive individual, in order to determine the zygosity of the former by analyzing proportions of offspring phenotypes is termed as a:
| 1. | Monohybrid cross | 2. | Test cross |
| 3. | Back cross | 4. | Reciprocal cross |
Subtopic: Monohybrid Cross: Further Understanding |
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