Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): | A father will never pass the gene for haemophilia to his sons |
Reason (R): | Haemophilia is sex-linked (X-linked recessive trait). |
In the light of the above statements, choose the correct answer from the options given below :
1. | (A) is correct but (R) is not correct. |
2. | (A) is not correct but (R) is correct. |
3. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
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) |
Assuming that fur colour of an animal is dark, range of colour shade and white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F1 generation?
1. All intermediate colour
2. Range of colour shade
3. All dark colour
4. All white colour
In Drosophila, the genes for color of body and color of eyes are situated on _______.
1. both the sex chromosomes
2. autosomes
3. Y-chromosome
4. X-chromosome
A low frequency recombination indicates that the genes are:
1. Located far apart from each other
2. Located close to each other
3. Not linked
4. Present on different c
Statement I: | Sickle cell anaemia and Haemophilia are autosomal dominant traits. |
Statement II: | Sickle cell anaemia and Haemophilia are disorders of the blood. |
1. | Sex unspecified | |
2. | Affected individual | |
3. | Consanguineous mating | |
4. | Parent with male child affected with disease |