Q. No.A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offspring?
2. A, B and AB
3. A, B, AB and O
4. Only O
A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
1. polyploidy
2. somaclonal variation
3. polyteny
4. aneuploidy
| 1. | chromosomes failed to separate during meiosis |
| 2. | the two genes are linked and present on the same chromosome |
| 3. | both of the characters are controlled by more than one gene |
| 4. | the two genes are located on two different chromosomes |
Chromosomal theory of inheritance was proposed by:
1. Sutton and Boveri
2. Bateson and Punnet
3. T. H. Morgan
4. Watson and Crick
If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is:
1. 0
2. 0.5
3. 0. 75
4. 1
| 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 |
What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
1. Down's syndrome
2. Turner's syndrome
3. Klinefelter's syndrome
4. Edward syndrome
| 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 |
A. IAIA | IBi | IBi
B. IAIA | IBi | IAi
C. IB i IA IA| IA IB
D. IAIA | IBIB | IAi
E. IA | IBi | IAi
Choose the correct answer from the options given below:
1. C and D
2. D and A
3. A and B
4. B and E
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