NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
In a certain plant species, red flower colour (R) is dominant over...
In a certain plant species, red flower colour (R) is dominant over white (r), and broad leaf shape (B) is dominant over narrow leaf shape (b). A plant exhibiting red flowers and broad leaves is self-pollinated. The resulting seeds are grown, producing the following progeny:
- plants with red flowers and broad leaves
- plants with white flowers and broad leaves
Which of the following represents the correct genotype of the self-pollinated parent?
- plants with red flowers and broad leaves
- plants with white flowers and broad leaves
Which of the following represents the correct genotype of the self-pollinated parent?
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
The progeny exhibits a phenotypic ratio of red, broad : white, broad, which simplifies to for flower colour and for leaf shape.
Since the flower colour segregates in a ratio (red : white), the parent must be heterozygous for flower colour ().
Since all progeny have broad leaves and no narrow-leaved plants are produced, the parent must be homozygous dominant for leaf shape ().
Therefore, the genotype of the self-pollinated parent is .
Answer:
Since the flower colour segregates in a ratio (red : white), the parent must be heterozygous for flower colour ().
Since all progeny have broad leaves and no narrow-leaved plants are produced, the parent must be homozygous dominant for leaf shape ().
Therefore, the genotype of the self-pollinated parent is .
Answer: