Question

If hybrid red flowered plants of pea are crossed back to pure red flowered parent, the progeny will show

• A. All red flowered plants
• B. White flowered plants
• C. 50% red and 50% white flowered plants
• D. 3 red : 1 white flowered plants

Answer 1

Answer: (A)

All red flowered plants

When hybrid red flowered plants, that is heterozygous ones are crossed with dominant red flowered homozygous plants, the resultant phenotypes all will exhibit red coloured flowers. It is because all the plants will contain the dominant allele for the red flower character. A dominant character if present in homozygous condition as well as heterozygous condition, it will express the resultant phenotype.