Question
Biology Question on Non-Mendelian Genetics
Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to
A
linkage
B
repulsion
C
crossing over
D
recombination
Answer
linkage
Explanation
Solution
Linkage is the tendency of alleles(belonging to different genes) to be passed together from one generation to another. Geneson the same chromosome can only show linkage. Gene on a non-homologous chromosomeis unlinked and always displays linkage.
William Bateson, ER Saunders and RC Pennett worked with Lathyrus odoratus (sweet pea) in 1905. They were the first to discover linkage, an exception to the law of independent assortment.