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Question
Differentiate between Mendel’s monohybrid cross and dihybrid cross.
Solution
| Monohybrid Cross | Dihybrid Cross | |
| 1. | A cross between two pure organisms to study the inheritance of a single pair of contrasting characters. | A cross between two pure organisms to study the inheritance of two pairs of contrasting characters. |
| 2. | It produces a phenotypic monohybrid ratio of 3:1 in the F2 generation. | It produces a phenotypic dihybrid ratio of 9:3:3:1 in the F2 generation. |
| 3. | It produces a genotypic ratio of 1:2:1 in the F2 generation. | It produces a genotypic ratio of 1:2:1:2:4:2:1:2:1 in the F2 generation. |
| 4. | Example: Cross between tall and dwarf pea plants | Example: Cross of pea plants with round and yellow seeds and plants with wrinkled and green seeds |
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