A true-breeding plant with red fruit is crossed with a true-breeding plant with orange fruit. All of the F1 plants are red, but when these are crossed, the F2 plants consist of 135 red and 105 orange (this is NOT a 3:1 ratio).

This result suggests that:

Answer
a.
fruit color is determined by recessive epistasis.
b.
fruit color is determined by complementary gene action.
c.
red fruit is completely dominant to orange fruit.
d.
fruit color is determined by alleles of a single gene.

Question

A true-breeding plant with red fruit is crossed with a true-breeding plant with orange fruit. All of the F1 plants are red, but when these are crossed, the F2 plants consist of 135 red and 105 orange (this is NOT a 3:1 ratio).

This result suggests that:

Answer
	 a.	
fruit color is determined by recessive epistasis.
	 b.	
fruit color is determined by complementary gene action.
	 c.	
red fruit is completely dominant to orange fruit.
	 d.	
fruit color is determined by alleles of a single gene.

alphadxg · Answer

I have an answer in mind, let me know what you think.

abhisar · Answer

same question ?

alphadxg · Answer

Nope different.

alphadxg · Answer

Oops, I know what it is, it's B.