MCQ
Humus is
- ADark coloured amorphous organic matter rich in lignin
- ✓Dark coloured organic matter rich in cellulose
- CBoth $(a)$ and $(b)$
- DRed coloured substances rich in iron
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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 |