Question

Dominant gene for tallness is T and for yellow colour is Y. A plant heterozygous for both the traits is selfed, then the ratio of pure homozygous dwarf and green offspring would be

• A. 1/4
• B. 4/16
• C. 3/16
• D. 1/16.

Answer 1

The correct option is D 1/16.

A cross is made between the a plant ,tall and yellow seeds(TTYY) with another plant with dwarf and green(ttyy) seeds. In the F1 generation, progeny with tall and yellow seeds(TtYy) are obtained. When this selfed, in the F2 generation, 9 progeny with tall yellow seeds 3 progeny with tall wrinkled, 3 progeny with dwarf yellow seeds 1 progeny with dwarf green seeds are formed. Genotypically, 2 progeny are showing parental genotypes(TTYY, ttyy).

So, the correct option is ‘1/16'.