CBSE Class 12-science Answered
Please find the question in the picture.
Asked by sanchitdora5 | 30 Mar, 2020, 10:10: PM
Expert Answer
- Incomplete dominance is the phenomenon where none of the two contrasting alleles or factors isdominant.
- The expression of the character in a hybrid or F1 individual is intermediate or a fine mixture of the expression of the two factors.
- The phenotypic ratio of offspring in the F2 generation is 1:2:1 which is similar to the genotypic ratio.
- In Mirabilis jalapa (Four o’clock plant), there are two types of flowers, red and white.
- When the two types of plants are crossed, the hybrids of the F1 generation bear pink flowers.
- When the F1 hybrids are selfed, we obtain three types of plants in the F2 generation—one with red flowers, one with pink flowers and one with white flowers in the ratio of 1:2:1.
- The appearance of pink colour is either due to the mixing of red and white colours or the expression of a single gene for a pigmented flower which produces only pink colour.
Answered by Sheetal Kolte | 31 Mar, 2020, 11:36: AM
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