In Mendel's monohybrid cross, we see one trait, like pea colour, giving a 3:1 ratio in the second generation—three yellow to one green. For a dihybrid cross, he tracked two traits together, like colour and shape, which gave the lovely 9:3:3:1 ratio. Teaching this, I always draw these ratios slowly on the blackboard, one chalk dot at a time. It reminds me of my own garden, where I save seeds from my tallest pea plants each year, and the simple maths of inheritance feels as real as the soil on my chhaati.
#grassroots#parents
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