64. In Drosophila normal wings are dominant to curly wings. Heterozygotes have normal wings. Pure breeding normal wing males are mated with pure breeding curly wing females; their offspring are then...

64. In Drosophila normal wings are dominant to curly wings. Heterozygotes have normal wings.
Pure breeding normal wing males are mated with pure breeding curly wing females; their
offspring are then mated. What is the phenotypic ratio in the F2 generation?
a. All offspring have curly wings
b. 1 normal wing offspring: 3 curly wing offspring
c. 1 normal wing offspring: 1 curly wing offspring
d. 3 normal wing offspring: 1 curly wing offspring
e. All offspring have normal wings

65. In gel electrophoresis, DNA fragments migrate toward the _______electrode; the _______the
fragment, the faster it moves through the gel.
a. negative; smaller
b. negative; larger
c. positive; smaller
d. positive; larger
e. none of the above