Answer Happy

23. Light eyes (It), dumpy wings (dy) and black body (b) are all at loci on chromosome 2 in Drosophila melanogaster. Light eyes and dumpy wing loci are separated by 20 map units Black body is ma units from dumpy wings. The order of the loci is light eyes-dumpy wings- black body. A dumpy winged male is crossed to a female with light eyes and black body. The FI is wild-type. F1 females are test-crossed (to a It, dy, b male) to produce 1000 progeny. Assume a coefficient of coincidence of 0.7. How many light-eyed flies (not dumpy wing, not black body) are expected from this test cross? a. 10.5 b. 335.5 c. 179 d. 89.5 e. 21.0 f. 64.5 24. From the same test cross as the previous question, how many wild-type progeny are expected? a. 10.5 b. 335.5 c. 179 d. 89.5 e. 21.0 f. 64.5 25. From the same cross, how many flies would be expected to express dumpy wings only? a. 10.5 b. 335.5 c. 179 d. 89.5 e. 21.0 f. 64.5 6.179