The karyotype of a person suffering from Down’s syndrome will show:
1.
44 Autosomes + XXY
2.
44 Autosomes + XO
3.
45 Autosomes [trisomy #21] + XY
4.
43 Autosomes [monosomy #21] + XY
| 1. | There is reduced synthesis of one of the globin chains. |
| 2. | It is an autosome-linked dominant blood disease. |
| 3. | Alpha thalassemia is controlled by two closely linked genes on chromosome 16. |
| 4. | Beta thalassemia is controlled by a single gene on chromosome 11. |
1. 0
2. ¼
3. ½
4. ¾
| 1. | much higher than the non-parental type |
| 2. | much lower than the non-parental type |
| 3. | equal to the non-parental type |
| 4. | not seen at all |
| 1. | It is inherited as an autosomal recessive condition. |
| 2. | The affected individual lacks the enzyme phenylalanine hydroxylase. |
| 3. | The affected individuals lack the capability of converting tyrosine to phenylalanine. |
| 4. | Clinical features include mental retardation and a reduction in hair and skin pigmentation. |
| 1. | Pleiotropy | Sickle cells anaemia |
| 2. | Polygenic inheritance | Human skin colour |
| 3. | Multiple allelism | ABO blood group |
| 4. | Gene/point mutation | Down’s syndrome |
1. Monkeys
2. Drosophila
3. Birds
4. Grasshoppers
Given below are two statements:
| Statement I: | Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance |
| Statement II: | Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height |
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Which of the following occurs due to the presence of autosome linked dominant trait?
| 1. | Thalessemia | 2. | Sickle cell anaemia |
| 3. | Myotonic dystrophy | 4. | Haemophilia |
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 339461
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 339461
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Mendel's law of Independent assortment does not hold good for the genes that are located closely on the same chromosome. |
| Reason (R): | Closely located genes assort independently. |
In the light of the above statements, choose the correct answer from the options given below:
| 1. | (A) is False, (R) is True. |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 4. | (A) is True, (R) is False. |
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