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In Drosophila Crossing over in paracentric region is lethal and leads to cross-over suppression. This leads to reduction in fertility.(a) True(b) FalseThis question was addressed to me in an interview for job.My enquiry is from Chromosomal Abnormality : Inversion in chapter Chromosomal Basis of Inheritance of Cytogenetics

Answer»

The correct ANSWER is (b) False

To EXPLAIN: In Drosophila only females undergo recombination. In the case of EGG formation out of the 4 meiotic products, only one forms the egg and the 3 other forms the polar body. Thus, the cross over suppressed gamete simply forms the polar body so doesn’t affect fertility.



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