In hybridisation Tt × tt gives rise to the progeny of ratio
1 : 1
1 : 2
2 : 1
1 : 2 : 1
Correct answer: 1 : 1
Solution
A heterozygous parent (Tt) produces two kinds of gametes, T and t, in equal numbers, while tt produces only t gametes. Combining them gives Tt and tt in equal proportion, so the phenotypic/genotypic ratio is 1:1.