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Q. No.
Assertion(A):
The genotype of an individual with A group blood could be IAi but O group genotype can only be ii.
Reason(R):
The allele i is recessive to allele IA
1.
Both (A) and (R) are True and (R) is correct explanation of (A)
2.
Both (A) and (R) are True and (R) is not correct explanation of (A)
3.
(A) is True but (R) is False
4.
Both (A) and (R) are False
Subtopic: Co-dominance |
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Suresh and Rajesh have defective haemoglobin due to genetic disorders. In Suresh, the problem is qualitative as he is having incorrectly functioning globin molecules while in Rajesh the problem is quantitative as he is having very few globin molecules. Identify the disorder they are suffering from.
| Suresh | Rajesh | |
| 1. | Thalassemia - Autosomal Dominant blood disorder |
Sickle Cell Anaemia - Autosomal linked Recessive trait |
| 2. | Sickle Cell Anaemia - Autosomal linked Dominant trait |
Thalassemia - Autosomal Recessive blood disorder |
| 3. | Sickle Cell Anaemia – Autosomal linked Recessive trait |
Thalassemia – Autosomal Recessive blood disorder |
| 4. | Thalassemia - Autosomal Dominant blood disorder |
Sickle Cell Anaemia - Autosomal linked Dominant trait |
Subtopic: Mendelian Disorders: Sickle Cell Anemia | Mendelian Disorders: Thalassemia |
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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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Which of the following sets includes only recessive traits observed in Pisum sativum?
| 1. | Wrinkled seed shape, Green seed color, White flower color |
| 2. | Round seed shape, Yellow seed color, Purple flower color |
| 3. | Yellow pod color, Inflated pod shape, Axial flower position |
| 4. | Tall stem height, Green pod color, Round seed shape |
Subtopic: Monohybrid Cross: 1 |
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What is the primary rationale behind using a test cross in genetic analysis?
| 1. | To determine whether an individual displaying a dominant phenotype is homozygous dominant or heterozygous by crossing it with a homozygous recessive organism, which can only contribute recessive alleles. |
| 2. | To confirm the presence of dominant alleles in an individual by crossing it with a homozygous dominant parent, ensuring that all offspring exhibit the dominant phenotype. |
| 3. | To analyze the independent assortment of two different genes by crossing an individual with another that carries a dominant phenotype for both traits. |
| 4. | To eliminate recessive traits from a population by selectively breeding only individuals that exhibit dominant phenotypes. |
Subtopic: Monohybrid Cross: 1 |
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What is the relationship between the strength of linkage and recombination frequency?
| 1. | Stronger linkage results in a higher recombination frequency. |
| 2. | Recombination frequency and linkage strength are independent of each other. |
| 3. | Stronger linkage results in a lower recombination frequency. |
| 4. | Higher recombination frequency indicates stronger linkage. |
Subtopic: Recombination & Gene Mapping |
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How many of the following sex determination mechanisms are correctly matched?
1. One correctly matched
2. Two correctly matched
3. All three correctly matched
4. None correctly matched
| Species | Mechanism of Sex Determination |
| Grasshoppers | XO Type |
| Birds | ZW Type |
| Honeybees | Haplodiploidy |
1. One correctly matched
2. Two correctly matched
3. All three correctly matched
4. None correctly matched
Subtopic: Sex Determination |
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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 garden pea plant produced axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant traits.
1. axial, violet flowers.
2. Axial, white flowers
3. Terminal, violet flowers
4. Terminal, white flowers
1. axial, violet flowers.
2. Axial, white flowers
3. Terminal, violet flowers
4. Terminal, white flowers
Subtopic: Dihybrid Cross: Details |
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Why are X-linked recessive traits more frequently observed in males than in females?
| 1. | Males inherit two X chromosomes, making them more susceptible to mutations. |
| 2. | Males have only one X chromosome, so a single mutated allele is sufficient to express the trait. |
| 3. | Females inherit only one X chromosome, making it less likely for them to inherit two defective alleles. |
| 4. | X-linked recessive traits do not require inheritance from both parents to be expressed in females. |
Subtopic: Mendelian Disorders |
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