The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy (h) body
Assume that a cross is made between a fly with normal wings and a hairy body and a fly with vestigial wings and normal body hair. The wild-type F1 flies were crossed among each other to produce 1024 offspring. Which phenotypes would you expect among the 1024 offspring, and how many of each phenotype would you expect?
Phenotypes: wild, vestigial, hairy, vestigial hairy
Numbers expected: wild (576), vestigial (192), hairy (192), vestigial hairy (64)
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All of the following are true about botulinum toxin/Botox except
A) The toxin is one of the most potent toxins known. B) Botox is a SNARE protein. C) It can be used therapeutically to stop muscle spasms. D) It has been used to remove wrinkles caused by muscle contractions. E) It has potential use as a migraine headache treatment.
Most digestion take place in the
a. stomach. b. small intestine. c. large intestine. d. stomach and small intestine equally. e. small and large intestine equally
An Hfr cell and an F? cell result from conjugation between a donor cell and a recipient cell. Which statement is false regarding this event?
A. The donor could not have been F?. B. The donor could have been either F? or F+. C. The recipient could have been F?. D. The donor could have been Hfr.
The RNase known as ________ helps cut eukaryotic double-stranded RNAs to form the miRNA species.
Fill in the blank(s) with the appropriate word(s).