The best example of pleiotropy is:
1. | Skin color | 2. | Phenylketonuria |
3. | Colour Blindness | 4. | ABO Blood group |
The number of contrasting characters studied by Mendel for his experiments was:
1. | 14 | 2. | 4 |
3. | 2 | 4. | 7 |
Chromosomal theory of inheritance was proposed by:
1. Sutton and Boveri
2. Bateson and Punnet
3. T. H. Morgan
4. Watson and Crick
In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?
1. | 25% | 2. | 100% |
3. | 50% | 4. | 75% |
How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
1. | 2 | 2. | 14 |
3. | 6 | 4. | 4 |
Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.
1. | A person will have only two of the 3 alleles. |
2. | When IA and IB are present together, they express same type of sugar. |
3. | Allele 'i' does not produce any sugar. |
4. | The gene (I) has three alleles. |
Select the correct match:
1. | Phenylketonuria | Autosomal dominant trait |
2. | Sickle cell anemia | Autosomal recessive trait chromosome - 11 |
3. | Thalassemia | X linked |
4. | Haemophilia | Y linked |
Experimental verification of the chromosomal theory of inheritance was done by:
1. | Sutton | 2. | Boveri |
3. | Morgan | 4. | Mendel |
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.