How many hermaphrodites are produced of cross-fertilization of Caenorhabditis el

Question

How many hermaphrodites are produced of cross-fertilization of Caenorhabditis elegans? A. 99% C. 50% D. 100% The regions on Y chromosome that share homology with X chromosomes and which synapse and recombines is known as: A. Pseudoautosomal regions (PARs) or Male-specific regions of Y (MSY) B. Sex determining region Y (SRY) C. Testis determining factor (TDF) D. None of the above What controls four "autosomal genes" in Drosophila? A. PARs region B. MSY region C. TDF D. Sxl (Master-switch) gene Identify a "male" in following Drosophila chromosomal formulation: A. 3X: 3A B. 2X: 2A C. X: 2A D. None of the above Sex chromatin bodies "Barr-bodies" are "inactive areas in: A. X-chromosomes B. Y chromosomes C. Autosomes

Explanation / Answer

38. D. Sxl (Master-switch) gene (Explanation - The sex-lethal gene i.e the sxl gene of Drosophila is thr master switch gene which takes part in somatic sex determination.)

39. C. X:2A

40. A. X-chromosomes

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