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Q.
$\underline{A}$ is the father of experimental genetics selected $\underline{B}$ as experimental material.
Principles of Inheritance and Variation
Solution:
Thomas Hunt Morgan $(1866-1945)$, an American genetist and Nobel Prize winner of $1933$, is considered as Father of Experimental Genetics for his work and discovery on linkage, crossing over, sex linkage, criss cross inheritance, linkage maps, mutability of genes, etc. He selected fruit fly, Drosophila melanogaster as research material in experimental genetics.