In Mendelian Inheritance:
I:
Some alleles are dominant while others are recessive; an organism with at least one dominant allele will display the effect of the dominant allele.
II:
During gamete formation, the alleles for each gene segregate from each other so that each gamete carries only one allele for each gene.
III:
Genes of different traits can segregate independently during the formation of gametes.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Dihybrid Cross Analysis |
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Consider the two statements:
| I: | In Incomplete Dominance, F1 has a phenotype that does not resemble either of the two parents and is in between the two. |
| II: | In Co-Dominance, F1 has a phenotype that resembles both the parents. |
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: Law of Segregation and Law of Independent Assortment |
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In ABO blood group system, the number of alleles, the number of genotypes and the number of phenotypes possible respectively is:
1. 3, 4 and 6
2. 3, 6 and 4
3. 2, 4 and 6
4. 2, 6 and 4
1. 3, 4 and 6
2. 3, 6 and 4
3. 2, 4 and 6
4. 2, 6 and 4
Subtopic: Co-dominance |
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Consider the given two statements:
| Assertion (A): | Multiple alleles can be found only when population studies are made. |
| Reason (R): | Multiple alleles for the same gene are always located on heterologous chromosomes. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Dominance Deviation from Mendel: 1 |
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In pea seeds, starch synthesis in pea seeds is controlled by one gene. A plant with genotype Bb will produce:
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
Subtopic: Co-dominance |
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Using the genotypic symbols Y for dominant yellow seed colour and y for recessive green seed colour, R for round shaped seeds and r for wrinkled seed shape, when a plant with genotype RrYy is self-hybridized, the proportion of progeny with yellow seeds is expected to be:
1. 9/16
2. 3/16
3. 3/4
4. 1/4
1. 9/16
2. 3/16
3. 3/4
4. 1/4
Subtopic: Dihybrid Cross Analysis |
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This type of inheritance pattern for the trait shown in the given pedigree most likely is:
1. Autosomal Dominant
2. Autosomal Recessive
3. X-linked Dominant
4. X linked recessive
1. Autosomal Dominant
2. Autosomal Recessive
3. X-linked Dominant
4. X linked recessive
Subtopic: Pedigree Analysis: Basics |
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Three Scientists independently rediscovered Mendel’s results on the inheritance of characters in 1900. They were:
1. Avery–MacLeod–McCarty
2. de Vries, Correns and von Tschermak
3. Nirenberg, Mathei, Khorana
4. Paul Berg, Boyer and Cohen
1. Avery–MacLeod–McCarty
2. de Vries, Correns and von Tschermak
3. Nirenberg, Mathei, Khorana
4. Paul Berg, Boyer and Cohen
Subtopic: Chromosomal Basis of Inheritance: Introduction |
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That the pairing and separation of a pair of chromosomes would lead to the segregation of a pair of factors they carried is the argument that formed the basis for:
| 1. | the Law of Independent Assortment. |
| 2. | the concept of Linkage |
| 3. | the chromosomal theory of inheritance. |
| 4. | the One Gene One Enzyme hypothesis. |
Subtopic: Chromosomal Basis of Inheritance: Introduction |
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Consider the two statements:
| Statement I: | The fruit fly is a popular choice as a model organism in genetics. |
| Statement II: | It has a very long generation time and low fecundity (females lay only a few eggs in life time). |
| 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: Chromosomal Basis of Inheritance: Further Considerations |
90%
Level 1: 80%+
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