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Q. No.The given diagram shows:
1.
Exchange of segments between non-sister chromatids of homologous chromosomes during prophase I of first meiosis.
2.
Exchange of segments between non-sister chromatids of heterologous chromosomes during prophase I of first meiosis.
3.
Reciprocal translocation where there is an exchange of segments between heterologous chromosomes and it is a chromosomal aberration.
4.
Inversion, a chromosome aberration, due to non-disjunction of homologues at first meiosis.
Subtopic: Non - Disjunction & Aneuploidy | Mutation |
52%
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Which one of the following pairs of genotype and phenotype ratios will be obtained in F2 generation for Snapdragon plants exhibiting incomplete dominance for red and white flower color traits?
1. 3:1 and 1:2:1
2. 1:2:1 and 3:1
3. 3:1 and 3:1
4. 1:2:1 and 1:2:1
1. 3:1 and 1:2:1
2. 1:2:1 and 3:1
3. 3:1 and 3:1
4. 1:2:1 and 1:2:1
Subtopic: Monohybrid Cross: Further Understanding |
66%
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The diagram below represents the pedigree of a certain genetic disease (affected individuals are shaded). What is the mode of inheritance of the gene responsible for this disease?
1. X-linked recessive
2. Y-linked
3. X-linked dominant
4. Mitochondrial
1. X-linked recessive
2. Y-linked
3. X-linked dominant
4. Mitochondrial
Subtopic: Pedigree Analysis: Basics | Pedigree Analysis: More Examples |
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Haplo-diploid insects have diploid females from fertilized eggs but haploid males from unfertilized ones. Such a haploid male with red eyes is crossed with a white eyed female. Assuming that the red-eye colour mutation is dominant over white-eye colour, which one of the following statements is true?
1. All females will have white eyes and all males will have red eyes.
2. All females will have red eyes and all males will have white eyes.
3. Half of the males will have red and the other half will have white eyes.
4. Half of the females will have red and the other half will have white eyes.
1. All females will have white eyes and all males will have red eyes.
2. All females will have red eyes and all males will have white eyes.
3. Half of the males will have red and the other half will have white eyes.
4. Half of the females will have red and the other half will have white eyes.
Subtopic: Chromosomal Basis of Inheritance: Introduction |
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Genetic variation in a population arises due to:
1. Recombination only
2. Mutations as well as recombination
3. Reproductive isolation and selection
4. Mutations only
1. Recombination only
2. Mutations as well as recombination
3. Reproductive isolation and selection
4. Mutations only
Subtopic: Mutation |
86%
From NCERT
NEET - 2013
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The diagram shows two possible arrangements of homologues at metaphase equatorial plate during meiosis and the resultant gametic combinations. This is the physical basis of:
| 1. Segregation | 2. Independent assortment |
| 3. Multiple allelism | 4. Pleiotropy |
Subtopic: Chromosomal Basis of Inheritance: Further Considerations |
74%
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Down's syndrome in humans is due to:
1. Three 'X' chromosomes
2. Three copies of chromosome 21
3. Monosomy
4. Two 'Y' chromosomes
1. Three 'X' chromosomes
2. Three copies of chromosome 21
3. Monosomy
4. Two 'Y' chromosomes
Subtopic: Non - Disjunction & Aneuploidy |
89%
From NCERT
NEET - 2013
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A normal girl, whose mother is haemophilic marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings?
Choose the most appropriate answer from the options given below:
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (d) only
4. (b) and (d) only
| (a) | Haemophilic son and haemophilic daughter. |
| (b) | Haemophilic son and carrier daughter. |
| (c) | Normal daughter and normal son. |
| (d) | Normal son and haemophilic daughter. |
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (d) only
4. (b) and (d) only
Subtopic: Mendelian Disorders: Hemophilia |
74%
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NEET - 2022
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Select the incorrect match regarding the symbols used in Pedigree analysis:
| 1. | .svg.svg) |
Sex unspecified |
| 2. | .svg.svg) |
Affected individual |
| 3. | .svg.svg) |
Consanguineous mating |
| 4. | .svg.svg) |
Parent with male child affected with disease |
Subtopic: Pedigree Analysis: Basics |
85%
From NCERT
NEET - 2022
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What is the expected percentage of F2 progeny with yellow and inflated pod in dihybrid cross experiment involving pea plants with green coloured, inflated pod and yellow coloured constricted pod ?
1. 100%
2. 56.25%
3. 18.75 %
4. 9%
1. 100%
2. 56.25%
3. 18.75 %
4. 9%
Subtopic: Dihybrid Cross Analysis |
54%
From NCERT
NEET - 2022
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