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