- 1(current)
Q. No.| A. | This disorder was first described by Langdon Down (1866). |
| B. | Such an individual has overall masculine development. However, the feminine development is also expressed. |
| C. | The affected individual is short statured. |
| D. | Physical, psychomotor and mental development is retarded. |
| E. | Such individuals are sterile. |
| 1. | A and E only | 2. | A and B only |
| 3. | C and D only | 4. | B and E only |
| 1. | Thalassemia | 2. | Down's syndrome |
| 3. | Turner's syndrome | 4. | Klinefelter's syndrome |
Match List-I with List-II
| List-I | List-II | ||
| (a) | Haemophilia | (i) | Inborn error of metabolism which lacks an enzyme that converts phenylalanine into tyrosine |
| (b) | Down's Syndrome | (ii) | Sex-linked recessive disorder; a defect in blood coagulation |
| (c) | Phenylketonuria | (iii) | Presence of additional copy of X-chromosome (44+XXY) |
| (d) | Klinefelter's Syndrome | (iv) | Additional copy of chromosome number 21 |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (i) | (iii) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (ii) | (iii) | (i) | (iv) |
| 4 | (i) | (ii) | (iii) | (iv) |
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
| Column I | Column II | |
|---|---|---|
| (a) | XX–XO method of sex determination | (i) Turner’s syndrome |
| (b) | XX–XY method of sex determination | (ii) Female heterogametic |
| (c) | Karyotype – 45 | (iii) Grasshopper |
| (d) | ZW–ZZ method of sex determination | (iv) Female homogametic |
Select the correct ans
| Option | (a) | (b) | (c) | (d) |
|---|---|---|---|---|
| 1. | (ii) | (iv) | (i) | (iii) |
| 2. | (i) | (iv) | (ii) | (iii) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (iv) | (ii) | (i) | (iii) |
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?
1. Thalassemia
2. Klinefelter's Syndrome
3. Phenylketonuria
4. Turner's Syndrome
A human female with Turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional chromosome.
3. exhibit male character
4. is able to produce children with a normal husband.
| 1. | Klinefelter's syndrome-44 autosomes + XXY |
| 2. | Colourblindness – Y-linked |
| 3. | Erythroblastosis foetalis-- X-linked |
| 4. | Down syndrome--44 autosomes + XO |
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in males. It proves:
| 1. | In human beings, the Y chromosome is active in sex determination. |
| 2. | Y chromosome is active in sex determination in both human beings and Drosophila. |
| 3. | In Drosophila Y-chromosome decides femaleness. |
| 4. | The Y chromosome of man has genes for the syndrome. |
- 1(current)
Q. No.
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