Answer:
Look below.
Explanation:
You could solve this by using a punnett square. I tried my best to repicate a punnett square below but look up punnett squares for more reference.
y y
----------------------------------------------------
r / yr / yr /
/ ---------------------/--------------------------- /
r / yr / yr /
-----------------------------------------------------
The probability of the phenotype being yr is 100% meaning that the phenotype would be yr which could be either yellow or red.
