Questions for 16 July zoology
Q:-1 Describe the general feature and life cycle of Nereis and compare its general body plan with earthworm. (20) Q:-2 Define linkage. How concept of linkage had established? Discuss its significance with examples. (15) Q:-3 Female Drosophila with cinnabar eye (cn) and vestigial wings (vg) were mated to males with roof wings (rf). The F1 were all wild-type. When the F1 females were test crossed with males homozygous for all three traits the following result were obtained. 382 cinnabar, vestigial P 401 roof P 3 cinnabar DCO 4 roof, vestigial DCO 59 cinnabar, roof, vestigial SCO1 67 wild SCO1 44 cinnabar, roof SCO2 40 vestigial SCO2 Calculate following a) gene order b) Interference Draw gene map. (20) Q:-4 What is recombination? Discuss its significance. (10) Q:-5 Describe the life cycle of Leach with well labelled diagrams. (15)