Determine the number of different phenotypes produced in a testcross
(e) For a testcross, the F1 plant is crossed with a homozygous recessive plant (rrttvvcc). To find the number of different phenotypes produced in the testcross, analyze all possible combinations that can be produced.
Testcross: RrTtVvCc x rrttvvcc
The possible combinations are as follows:
- Round, Terminal, Violet, Constricted
- Round, Terminal, Violet, Full
- Round, Terminal, White, Constricted
- Round, Terminal, White, Full
- Round, Axial, Violet, Constricted
- Round, Axial, Violet, Full
- Round, Axial, White, Constricted
- Round, Axial, White, Full
- Wrinkled, Terminal, Violet, Constricted
- Wrinkled, Terminal, Violet, Full
- Wrinkled, Terminal, White, Constricted
- Wrinkled, Terminal, White, Full
- Wrinkled, Axial, Violet, Constricted
- Wrinkled, Axial, Violet, Full
- Wrinkled, Axial, White, Constricted
- Wrinkled, Axial, White, Full
There are 16 different phenotypes that can be produced in a testcross.