Question

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

• A. Only red flowered plants
• B. Red flowered as well as pink flowered plants
• C. Only pink flowered plants
• D. Red, Pink as well as White flowered plants

Answer 1

The Correct Option is B

In Snapdragon plants, flower color follows incomplete dominance, where the red allele (R) and the pink allele (R’) both contribute to flower color.

- If a pink flowered plant (R’R’) is crossed with a red flowered plant (RR), the F1 progeny will inherit one red allele (R) from the red parent and one pink allele (R’) from the pink parent. This results in red and pink flowered plants in the progeny.

- Red flowered plants will occur when two red alleles (RR) are inherited, while pink f lowered plants will be the result of inheriting one red allele and one pink allele (R’R).

Answer 2

In the case of incomplete dominance in Snapdragon plants, a cross between red (RR) and pink (Rr) flowered plants will produce progeny with red and pink flowers.

The red color is dominant over the pink color, but both can appear in the offspring.

Thus, the correct answer is (2) Red flowered as well as pink flowered plants.