Q2 of 41 Page 190

One student (researcher) wants to cross pure tall plant (TT) with pure dwarf (tt) plant, what would be the F1 and F2 generations? Explain. (AS1)

FIRST FILIAL GENERATION: The features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus, say height, produces all heterozygous tall plants.

SECOND FILIAL GENERATION: In the second generation the heterozygous tall plants were crossed which produced 25% homozygous tall and dwarf plants each and the remaining 50% heterozygous tall plants.


This shows that the two alleles T and t can assort independently and the recessive trait appears back in the F2 generation whose expression had been masked in the F1 generation



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