Question

hi guys explain how dihybrid cross ratio is 3:1 ????

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Answer 1

Answer:

The dihybrid cross-refers to the inheritance of two pairs of contrasting characters by two parents at the same time. For example, a cross of two pea plants, one with yellow and round seeds (YYRR) and other with green and wrinkled seeds (yyrr). Selfing of F1 hybrids give dihybrid ratio of 9:3:3:1 in F2 generation.