Linked genes show.....

Thomas Hunt Morgan worked on which of the following organisms?

When the number of recombinant progeny is usually less than the number expected in independent assortment, it is called:

$A$ scientist performed a gene mapping experiment in maize. He mapped genes on chromosomes based on the percentage of crossing over between different genes. One map unit corresponds to $1\%$ crossing over or recombination frequency. Based on the study of crossing over in maize, the scientist observed the following recombination percentages between genes $A, B, C,$ and $D$: $A$ and $D = 10\%$, $A$ and $C = 3\%$, $C$ and $D = 7\%$, $A$ and $B = 5\%$, and $C$ and $B = 8\%$. Based on these observations, determine the correct order of genes $A, B, C,$ and $D$ on the chromosome.

Discuss why Drosophila has been used extensively for genetical studies.

Coupling and repulsion are the two faces of