Question

If a homozygous red flowered plant (RR) is crossed with a homozygous white flowered plant (rr), the offspring would be

• A. Half red flowered
• B. Half white flowered
• C. All red flowered
• D. Half pink flowered

Answer 1

Answer: (C)

All red flowered

Genes exist in two forms dominant and recessive. The allele which express itself is known as dominant and the allele which is unable to express itself is known as recessive allele. When same allele of a particular gene is present in a species it is known as homozygous. When different allele of a particular gene is present in a species it is known as heterozygous.

If a homozygous red flowered plant (RR) is crossed with a homozygous white flowered plant (rr), the genotype of the offspring will be Rr. The allele R is the dominant allele and r is the recessive allele for the color of the flower. So, the Rr offspring will be red.

So, the correct answer is option C.