Practice for Dihybrid problems
In pea plants purple flower color is dominant over white and tall is dominant over short.
Assign letters to represent genotypes for the following:
heterozygous tall, white plant _______________
homozygous tall, hybrid purple plant_________
purebred purple short plant _________________
hybrid purple,tall plant_____________
white short plant_______________________
heterozygous purple, short plant____________
Assign phenotypes to the following letters:
PpTt____________
PpTt___________________
PPtt_________________
ppTt_____________________
What will be the offspring from the mating of a homozygous tall , white plant(male) with a short ,
homozygous purple plant (female)?
1. Assign letters (remember each trait gets two letters)
__________________ X _____________________
2.
Determine gamete combinations: Determine gametes by F.O.I.L : First Outer Inner Last
Male __________________
2. Set up square:
__________
_________
_________
_________
Female ____________________
What will be the offspring from the mating of heterozygous purple, heterozygous tall plant and another
of the same type?
1. Assign letters
___________________________ X ____________________________
2. Determine gamete combinations: F.O.I.L. (first , inside, outside, last)
3. Set up Square, Fill in
4. List the different possible genotypes:
5. List the different possible phenotypes: