Right.
YY: ____1_____ Yy: ____2_______ yy: _____1________
Notice that the genotypic ratio (1:2:1) is different than the phenotypic ratio
(3:1). Why is that?
The heterozygous individuals (Yy) have the same phenotype as homozygous dominant individuals (YY), but it is a different genotype.
Ready for the next problem?
Problem #2
In pea plants, tall is dominant to short. Cross a heterozygous tall pea plant with a short pea plant.
__________ x __________
What is the genotype of the tall plant?
a. TT
b. Tt
c. tt
d. tall