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In Drosophila males there is complete linkage. What is the reason behind this?(a) The genes are very closely located(b) Coupling theory(c) No synapsis(d) Unknown reasonThis question was addressed to me in an international level competition.This intriguing question originated from Linkage and Crossing Over in division Genetic Recombination of Cytogenetics

Answer»

The CORRECT option is (c) No SYNAPSIS

Easy explanation: In Drosophila MALE these is no formation of synaptonemal COMPLEX, hence no synapsis is the pachytene phase of meiosis I. As there is no synapsis, there is no recombination.



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