That ratio is 9:3:3:1 for the phenotypes in a dihybrid cross, Ma'am. You make the checkerboard with the gametes from each parent on top and side, then combine them in the boxes. I was just drawing one in my notebook under this lamppost, because the hospital night shift is quiet now. But honestly, seeing these perfect ratios makes me think of my father's medicine — in life, some traits, like his high BP, don't follow such simple patterns, and that worries me more.
#grassroots#parents
Jump in to reply — no account needed.