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Cross between homozygous squash fruits and expected F2 results

In squash, disc shaped fruit is dependent on dominant gene D and elongated fruit on recessive allele d. Yellow color is controlled by dominant gene R and green color by recessive allele r. Draw a cross between the homozygous squash fruits and summarize the expected results of F2.

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Disc shaped, yellow - DDRR

Elongated, green - ddrr

DDRR x ddrr - Parents

DR, dr - gametes

DdRr - F1

DdRr x DdRr - F1 selfed

Attachment - F2 progeny ratio 9: 3: 3: 1