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In D. melanogaster, the alleles dp+ and dp determine long versus short wings, and e+ and e determine gray versus ebony body. A dihybrid cross was carried out to produce flies homozygous for both dp and e. The following phenotypes were obtained in the F2 generation: long wing, gray body […]

(1) Using Figure 1 and 9C in the paper by Carr & Konishi (1990), compute the conduction velocities for the ipsilateral and contralateral axons from the nucleus magnocellularis (NM) within the nucleus laminaris (NL). Assume that the NM axons travel in a straight line, perpendicular to the dorsomedial surface of NL. […]

1. If the genetic code were read in groups of four nonoverlapping nucleotides, using this nucleotide sequence, then the resulting amino acid sequence would be A) B-D-B. B) B-D-E. C) D-D-D. D) B-B-B. E) none of the above 2. A mutant bacterium is isolated. This bacterial strain has the characteristic […]

Slicing an average loaf of bread gives 13 medium thickness slices. Each slice of bread is to be coated with 0.05 oz. of mayonnaise. Each sandwich of two bread slices contains a slice of ham and a slice of cheese. Half of the sandwiches need to contain a sliced olive, […]