Genetics question for homework! Has to do with Mendelian traits please help!?

Question

If the gene for round/wrinkled peas and the gene for height were on the same chromosomes (linked) what phenotype ratio would you expect for RrTt X RrTt? Grandparents were purebred. hint: It is not 9:3:3:1

Answer 1

Linked genes do not assort independently.

Parents: RrTt x RrTt
Gametes: RT rt from one parent; RT rt from other parent.
Offspring: RRTT RrTt rRtT rrtt
3 round, tall : 1 wrinkled, short

Answer 2

it depends on how closely the traits are linked. The answer cannot be ascertained based on the info provided.