Question

Ratio of progeny when a red colored heterozygote is crossed with a white colored plant in which red color characteristic is dominant over white color is

• A. 3 : 1
• B. 1 : 1
• C. 1 : 2 : 1
• D. 9 : 3 : 3 : 1

Answer 1

The correct option is B 1 : 1

Genotype of a heterozygous red flowered plant where red is dominant: Rr
Gametes: R and r
Genotype of a homozygous recessive white coloured flower plant : rr
Gametes: r
Fusion of gametes: Rr (red flowers) and rr (white flowers)
Therefore, the ratio between red coloured flowers and white coloured ones in this cross is 1 (heterozygous red) : 1 (white)

So, the correct answer is '1:1'