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4.Principles of Inheritance and Variation
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In which one of the following, complementary gene interaction rato of $9: 7$ is observed?
A
Fruit shape in Shepherd's purse
B
Coat colour in mouse
C
Feather colour in fowl
D
Flower colour in pea
Solution
W Bateson and R C Punnett observed complementary gene interaction for flower colour in sweet pea (Lathyrusodoratus). In complementary interaction, two separate pairs of genes interact to produce the phenotype in such a way that neither of the dominant genes is expressive unless the other one is present. In $F_{2}$ generation, complementary genes produce a ratio of $9: 7$
Standard 12
Biology
Similar Questions
Match the columns :
| Column $I$ |
Column $II$ |
| $(1)$ Lethal mutation | $(a)$ Mutation caused by external factors |
| $(2)$ Spontaneous mutation | $(b)$ They are metabolic errors |
| $(3)$ Induced mutation | $(c)$ As a result the mutant dies |
| $(4)$ Biochemical mutation | $(d)$ Most of the mutations occurs in nature are of this type. |
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