MCQ
Correct sequence is
- ✓Palaeozoic $ \to $ Mesozoic $ \to $ Coenozoic
- BMesozoic $ \to $ Archaeozoic $ \to $ Proterozoic
- CPalaeozoic $ \to $ Archaeozoic $ \to $ Coenozoic
- DArchaeozoic $ \to $ Palaeozoic $ \to $ Proterozoic
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| Column $-I$ | Column $-II$ |
| $(A)$ Dominance | $(i)$ Many genesgovern a single character |
| $(B)$ Codominance | $(ii)$ In a heterozygousorganism only one allele expresses itself |
| $(C)$ Pleiotropy | $(iii)$ In a heterozygousorganism both alleles express themselves fully |
| $(D)$ Polygenic | $(iv)$ A single gene inheritanceinfluences many characters |
$A.$ Variation at genetic level arises due to mutations.
$B.$ Technique of $DNA$ fingerprinting was initially developed by Alec Jeffreys