Question

R is dominant red flower trait while r is recessive white flower trait. Heterozygous Rr (red) is crossed with homozygous red flowered plant. 64 offspring are produced. Number of white flowered plants is

• A. 64
• B. 32
• C. 16
• D. 0

Answer 1

Answer: (B)

32

A heterozygous red flowered plant(Rr) is crossed to homozygous recessive white flowered plant(rr). In the next generation, 50% heterozygous red flowered plants and 50% homozygous recessive white flowered plants are formed. If 64 plants are formed, 32 are heterozygous red flowers, 32 are homozygous recessive white flowered plants.

So, the correct option is ‘32’.