Question

Lathyrus odoratus is an example of which of the following genes?

• A. Supplementary genes
• B. Complementary genes
• C. Lethal genes
• D. Codominant genes

Answer 1

The correct option is B Complementary genes

Complementary genes in Lathyrus odoratus: When two white flowered varieties of sweet pea, Lathyrus odoratus were crossed, F${}_1$ progeny had coloured flowers. When F${}_2$ progeny obtained from F${}_1$ was classified, plants with coloured flowers and those with white flowers were obtained in 9:7 ratio. This is again a modification of 9:3:3:1 ratio, where only one character. i.e., flower colour is involved and only two classes recognized (coloured and white flowers).