21. In Drosophila, spineless bristles (ss), eyeless (ey), and bent wings (bt) are recessive traits. A female heterozygou

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21 In Drosophila Spineless Bristles Ss Eyeless Ey And Bent Wings Bt Are Recessive Traits A Female Heterozygou 1 (43.68 KiB) Viewed 70 times

21. In Drosophila, spineless bristles (ss), eyeless (ey), and bent wings (bt) are recessive traits. A female heterozygous for all three traits is crossed to a male expressing all three traits and the following 1000 progeny were observed: ss ey bt 215 P ss + bt 38 ss ey + 22 35 pcoss + + R1 222 p Which of the following represents the correct female heterozygote? a. ss ey bt + + ey bt +ey bt 21 218 P + ey + ss ey bt C. ++bt 34 DCO +++ SS + bt ey + 36 202 ss + bt + ey 22. Based on the cross in the previous question, what is map distance between spineless and eyeless? a.genes are not linked b. 50 c. 8.3 d. 14.3 e. 7.1 f. 16