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Q. No.In animal kingdom, along with XX-YY mechanism, many other variants of chromosomal sex determination mechanisms have been described such as XX-XO mechanism, ZZ-ZW mechanism ZZ-ZO mechanism and haplo-diploidy mechanism, which are present respectively in:
1. Birds, Grasshopper, Wasp, Moth
2. Grasshopper, Birds, Moth, Wasp
3. Birds, Moth, Grasshopper, Wasp
4. Grasshopper, Moth, Birds, Wasp
Subtopic: Sex Determination |
82%
Level 1: 80%+
NEET - 2024
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The phenomenon where a single gene exhibits multiple phenotypic expressions is called:
1. Co-dominance
2. Pleiotropy
3. Multiple alleles
4. Polygenic inheritance
1. Co-dominance
2. Pleiotropy
3. Multiple alleles
4. Polygenic inheritance
Subtopic: Polygenic Inheritance & Pleiotropy |
83%
Level 1: 80%+
NEET - 2024
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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | In honey bee population, sons do not have fathers but have grandfathers. |
| Reason (R): | Haploidy in drones of honey bee is due to parthenogenesis while fertilisation results into female bees. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Sex Determination |
72%
Level 2: 60%+
NEET - 2024
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A cross between tall plants was made resulting in offspring of tall and dwarf plants with ratio 3 : 1. The genotype(s) of both parents are:
1. TT and TT
2. Tt and tt
3. Tt and Tt
4. tt and tt
1. TT and TT
2. Tt and tt
3. Tt and Tt
4. tt and tt
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
79%
Level 2: 60%+
NEET - 2024
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ABO blood group is an example of
| 1. | Incomplete dominance | 2. | Multiple allele |
| 3. | Pleiotropy | 4. | Linkage |
Subtopic: Co-dominance |
86%
Level 1: 80%+
NEET - 2024
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As per \(\mathrm{ABO}\) blood grouping system, the blood group of father is \(\mathrm{B^+}\), mother is \(\mathrm{A^+}\) and child is \(\mathrm{O^+}\). Their respective genotype can be
Choose the most appropriate answer from the options given below:
1. B only
2. C & B only
3. D & E only
4. A only
| A. | \(\mathrm{I^{B}i / I^{A}i / ii}\) |
| B. | \(\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}} / \mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}} / \mathrm{ii}\) |
| C. | \(\mathrm{I^AI^B/iI^A/I^Bi}\) |
| D. | \(\mathrm{I^{A}i / I^{B}i / I^{A}i}\) |
| E. | \(\mathrm{i I^B / i I^A / I^A I^B}\) |
1. B only
2. C & B only
3. D & E only
4. A only
Subtopic: Co-dominance |
67%
Level 2: 60%+
NEET - 2024
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Match List I with List II:
Choose the correct answer from the options given below:
1. A-II, B-III,C-IV, D-I
2. A-III, B-IV,C-I, D-II
3. A-IV, B-I, C-II, D-III
4. A-I, B-II, C-III, D-IV
| List I | List II | ||
| A. | Down's syndrome | I. | \(11^{\text {th }}\) chromosome |
| B. | \(\alpha\) -Thalassemia | II. | \(' \mathrm{X} '\) chromosome |
| C. | \(\beta\) -Thalassemia | III. | \(21^{\text {st }}\) chromosome |
| D. | Klinefelter's syndrome |
IV. | \(16^{\text {th }}\) chromosome |
Choose the correct answer from the options given below:
1. A-II, B-III,C-IV, D-I
2. A-III, B-IV,C-I, D-II
3. A-IV, B-I, C-II, D-III
4. A-I, B-II, C-III, D-IV
Subtopic: Mendelian Disorders | Chromosomal Disorders |
87%
Level 1: 80%+
NEET - 2024
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In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of black seed plant, with which of the following genotype will you cross it?
1. bb
2. Bb
3. BB/Bb
4. BB
1. bb
2. Bb
3. BB/Bb
4. BB
Subtopic: Monohybrid Cross: Further Understanding |
67%
Level 2: 60%+
NEET - 2024
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A pink flowered Snapdragon plant was crossed with red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?
1. Red flowered as well as pink flowered plants
2. Only pink flowered plants
3. Red, Pink as well as white flowered plants
4. Only red flowered plants
1. Red flowered as well as pink flowered plants
2. Only pink flowered plants
3. Red, Pink as well as white flowered plants
4. Only red flowered plants
Subtopic: Law of Segregation and Law of Independent Assortment | Dominance Deviation from Mendel: 1 |
63%
Level 2: 60%+
NEET - 2024
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Which one of the following can be explained as the basis of Mendel's Law of dominance?
Choose the correct answer from the options given below:
1. A, C, D and E only
2. B, C and D only
3. A, B, C, D and E
4. A, B and C only
| A: | Out of one pair of factors, one is dominant and the other is recessive. |
| B: | Alleles do not show any expression and both the characters appear as such in F2 generation. |
| C: | Factors occur in pairs in normal diploid plants. |
| D: | The discrete unit controlling a particular character is called factor. |
| E: | The expression of only one of the parental characters is found in a monohybrid cross. |
1. A, C, D and E only
2. B, C and D only
3. A, B, C, D and E
4. A, B and C only
Subtopic: Monohybrid Cross: 1 |
69%
Level 2: 60%+
NEET - 2024
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