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Q. No.Which of the following is a defining characteristic of Mendelian traits?
1.
They are controlled by multiple genes and influenced by the environment.
2.
They are always X-linked traits.
3.
They follow predictable patterns of inheritance based on dominant and recessive alleles.
4.
They are inherited through the mitochondrial DNA.
Subtopic: Introduction to Genetics: 1 |
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What was the significance of Mendel's large sampling size in his experiments?
| 1. | It increased the genetic diversity. |
| 2. | It increased the accuracy of his results. |
| 3. | It helped him create new species. |
| 4. | It led to blending inheritance. |
Subtopic: Introduction to Genetics: 1 | Introduction to Genetics: 2 |
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What term did Mendel use to describe the units of inheritance, now called genes?
| 1. | Chromosomes | 2. | Gametes |
| 3. | Factors | 4. | Alleles |
Subtopic: Monohybrid Cross: 1 |
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Which of the following is a dominant trait in Mendel's experiments?
1. Dwarf plants
2. Green seeds
3. Wrinkled seeds
4. Yellow seeds
1. Dwarf plants
2. Green seeds
3. Wrinkled seeds
4. Yellow seeds
Subtopic: Introduction to Genetics: 1 | Introduction to Genetics: 2 | Dihybrid Cross: Details |
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The chromosomal theory of inheritance suggests that:
| 1. | Genes are located on chromosomes and segregate during meiosis. |
| 2. | Genes blend together to form new traits. |
| 3. | Alleles are inherited randomly without connection to chromosomes. |
| 4. | Traits are passed down without involvement of genetic material. |
Subtopic: Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations |
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If a monohybrid cross between two heterozygous tall pea plants (Tt) shows a deviation from the expected 3:1 phenotypic ratio due to incomplete dominance, what would the phenotypic ratio of the F2 generation be?
1. 2 : 1 : 1
2. 1 : 2 : 1
3. 9 : 3 : 3 : 1
4. 1 : 1
1. 2 : 1 : 1
2. 1 : 2 : 1
3. 9 : 3 : 3 : 1
4. 1 : 1
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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Thalassemia is caused by mutations that reduce the production of hemoglobin chains. Which form of thalassemia results from mutations in the HBB gene, which is located on chromosome 11?
1. Alpha-thalassemia
2. Beta-thalassemia
3. Gamma-thalassemia
4. Delta-thalassemia
1. Alpha-thalassemia
2. Beta-thalassemia
3. Gamma-thalassemia
4. Delta-thalassemia
Subtopic: Mendelian Disorders: Thalassemia |
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Which of the following best differentiates thalassemia from sickle cell anaemia?
| 1. | Thalassemia involves abnormal haemoglobin shape, while sickle cell anaemia results from reduced haemoglobin production. |
| 2. | Sickle cell anaemia produces abnormally shaped red blood cells, while thalassemia reduces the quantity of functional haemoglobin. |
| 3. | Thalassemia affects oxygen-carrying capacity due to misshapen red blood cells, while sickle cell anaemia impacts red blood cell production. |
| 4. | Both conditions result solely from abnormal haemoglobin production, without any shape alterations in red blood cells. |
Subtopic: Mendelian Disorders: Sickle Cell Anemia | Mendelian Disorders: Thalassemia |
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Which of the following is not a typical feature of Down’s syndrome?
| 1. | Short stature and a small round head |
| 2. | Development of gynecomastia in males |
| 3. | Mental retardation |
| 4. | Broad palm with characteristic palm crease |
Subtopic: Non - Disjunction & Aneuploidy |
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In Mendel's experiments, he found that when crossing a true-breeding tall plant (TT) with a dwarf plant (tt), all F1 progeny were tall. This led him to conclude that:
| 1. | Dwarf trait is dominant over tall trait. |
| 2. | Tall trait is recessive and masked by the dwarf trait. |
| 3. | Tall trait is dominant and there is no blending of characters. |
| 4. | Dwarf plants have defective alleles that do not express in F1. |
Subtopic: Monohybrid Cross: 1 |
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