Question

In Drosophila melanogaster; the genes white and yellow shows ____a____ recombination and genes white and miniature wing shows _____b_____ linkage.

• A. $a-98.7\text{\%},b-37.2\text{\%}$
• B. $a-98.7\text{\%},b-62.8\text{\%}$
• C. $a-1.3\text{\%},b-37.2\text{\%}$
• D. $a-1.3\text{\%},b-62.8\text{\%}$

Answer 1

The correct option is D $a-1.3\text{\%},b-62.8\text{\%}$

In Drosophila melanogaster, the genes white and yellow shows $1.3\text{\%}$ recombination and genes white and miniature wing shows $62.8\text{\%}$ linkage.
Morgan found that the genes white and yellow were linked tightly and showed only $1.3$ percent recombination while white and miniature wing showed $37.2$ percent recombination. His student Alfred Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and ‘mapped’ their position on the chromosome.