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Q. No.A heterozygous pea plant with violet flowers was crossed with a homozygous pea plant with white flowers. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed?
1. 30 produced violet and 10 produced white flowers
2. 20 produced violet and 20 produced white flowers.
3. All 40 produced violet flowers
4. All 40 produced white flowers
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
71%
Level 2: 60%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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In which disorder, change of single base pair in the gene for beta globin chain results in change of glutamic acid to valine?
| 1. | Thalassemia | 2. | Sickle cell anemia |
| 3. | Haemophilia | 4. | Phenylketonuria |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
85%
Level 1: 80%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F1 plants had yellow seeds and pink flowers. The F1 plants were selfed to get F2 progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the F2 generation?
| 1. | 9 | 2. | 16 |
| 3. | 4 | 4. | 6 |
Subtopic: Dihybrid Cross: General Consideration |
Level 3: 35%-60%
NEET - 2023
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NEET 2026 - Target Batch - Vital
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Select the correct statements about sickle cell anemia:
Choose the correct answer from the options given below:
| A: | There is a change in the gene for beta-globin |
| B: | In beta-globin, there is a valine in place of Lysine |
| C: | It is an example of point mutation |
| D: | In the normal gene, U is replaced by A |
Choose the correct answer from the options given below:
| 1. | (B), (C) and (D) only | 2. | (B) and (D) only |
| 3. | (A), (B) and (D) only | 4. | (A) and (C) only |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
82%
Level 1: 80%+
NEET - 2023
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Select the correct statement/s with respect to mechanism of sex determination in Grasshopper.
Choose the correct answer from the options given below:
| A: | It is an example of female heterogamety |
| B: | Male produces two different types of gametes either with or without X chromosomes. |
| C: | Total number of chromosomes (autosomes and sex chromosomes) is same in both males and females. |
| D: | All eggs bear an additional X chromosome besides the autosomes. |
| 1. | (B) and (D) only | 2. | (A), (C) and (D) only |
| 3. | (A) only | 4. | (A) and (C) only |
Subtopic: Sex Determination |
77%
Level 2: 60%+
NEET - 2023
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Male and female individuals in which of the following organisms do not have the same number of chromosomes?
(a) Human
(b) Grasshopper
(c) Honey bee
(d) Drosophila
1. (a) and (d)
2. (b) and (c)
3. (b) and (d)
4. (c) only
(a) Human
(b) Grasshopper
(c) Honey bee
(d) Drosophila
1. (a) and (d)
2. (b) and (c)
3. (b) and (d)
4. (c) only
Subtopic: Sex Determination |
78%
Level 2: 60%+
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Match List - I with List - II
Choose the correct answer from the options given below:
| List - I | List - II | ||
| (Type of cross) | (Phenotypic ratio) | ||
| (A) | Monohybrid cross | (I) | 1:1 |
| (B) | Dihybrid cross | (II) | 1:2:1 |
| (C) | Incomplete dominance | (III) | 3:1 |
| (D) | Test cross | (IV) | 9:3:3:1 |
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | II | I |
| 2. | II | IV | III | I |
| 3. | II | III | IV | I |
| 4. | IV | III | I | II |
Subtopic: Monohybrid Cross: Further Understanding | Dihybrid Cross: General Consideration | Dihybrid Cross: Details | Dominance Deviation from Mendel: 1 | Dominance Deviation from Mendel: 2 |
84%
Level 1: 80%+
NEET - 2023
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Subtopic: Non - Disjunction & Aneuploidy |
80%
Level 1: 80%+
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A normal man and a normal woman both have one of their parent albino, if get married then what is the probability of their child being albino?
1. 20%
2. 25%
3. 75%
4. 80%
1. 20%
2. 25%
3. 75%
4. 80%
Subtopic: Mendelian Disorders |
76%
Level 2: 60%+
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Gynaecomastia is present in which syndrome?
1. Turner
2. Klinefelter
3. Down
4. None of the above
1. Turner
2. Klinefelter
3. Down
4. None of the above
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
90%
Level 1: 80%+
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