Differentiate between Mendel’s monohybrid cross and dihybrid cross.
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Solution
Monohybrid Cross | Dihybrid Cross |
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. |
It produces a phenotypic monohybrid ratio 3:1 in the F2 generation. | It produces a phenotypic dihybrid ratio 9:3:3:1 in the F2 generation. |
It produces a genotypic ratio 1:2:1 in the F2 generation. | It produces a genotypic ratio 1:2:1:2:4:2:1:2:1 in the F2 generation. |
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 |
Concept: Mendel’s Laws of Inheritance
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