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.
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 |
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 |
The sex in humans is determined at
(1) fertilization
(2) first trimester of pregnancy
(3) implantation
(4) organogenesis
A diploid cell containing 10 chromosomes undergoes meiosis. How many chromosomes
are present in the cell after meiosis II?
(1) 2
(2) 5
(3) 10
(4) 15
A diploid cell containing 10 chromosomes undergoesmeiosis. How many chromosomes are present in the cell after meiosis I?
1. 2
2. 5
3. 10
4. 20
The number of types of gametes produced by a plant with the genotype AaBbCCDd will be:
| 1. | 2 | 2. | 4 |
| 3. | 8 | 4. | 16 |
Mating between a male with blood group A and a female with blood group B results in the progeny with blood group AB can be explained by:
1. Complete dominance
2. Incomplete dominance
3. Co-dominance
4. Epistasis
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