Who discovered epistasis?

In which type of inheritance would you expect a maternal effect in more offspring?

Genes for cytoplasmic male sterility in plants are generally located in

In sweet peas,genes $C$ and $P$ are necessary for colour in flowers. The flowers are white in the absence of either or both the genes. What will be the percentage of coloured flowers in the offspring of the cross $Cc\ pp \times cc\ Pp$ (in $\%$)?

When two independently assorting dominant genes interact with each other to produce a specific phenotype,but cannot produce that phenotype when present alone,such genes are called .....

In a cross between white-flowered parents,$F_1$ progeny was uniformly purple-flowered. The $F_2$ progeny showed a phenotypic ratio $9:7$ between purple-flowered and white-flowered plants. The above result indicates that the flower colour is controlled by