Statement I: | Failure of segregation of chromatids during cell cycle, resulting in the gain or loss of whole set of chromosome in an organism, is known as aneuploidy. |
Statement II: | Failure of cytokinesis after anaphase stage of cell division resulting in the gain or loss of chromosome is called polyploidy. |
List-I Types of inheritance |
List-II Example |
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A. | Incomplete dominance | I. | Blood groups in human |
B. | Co-dominance | II. | Flower colour in Antirrhinum |
C. | Pleiotropy | III. | Skin colour in human |
D. | Polygenic inheritance | IV. | Phenylketonuria |
Statement I: | When many alleles of single gene govern a character, it is called polygenic inheritance. |
Statement II: | In Polygenic inheritance, the effect of each allele is additive |
Assertion (A): | In honey bee population, sons do not have fathers but have grandfathers. |
Reason (R): | Haploidy in drones of honey bee is due to parthenogenesis while fertilisation results into female bees. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |