Three of the many known coat colors in mink are the standard wild-type (black-brown) color, a blue-gray color known as silverblu, and a darker blue-gray color known as steelblu. Matings between wild-type mink can produce all wild-type or 3 wild-type: 1 silverblu or 3 wild: 1 steelblu. 1. Arrange the […]

You have discovered a new species of antelope that has particularly long legs that you name Dadduus longlegednis. When you examine the motor axons from a number of specimens, you notice that some of them seem to be suffering from some degree of demyelination. You determine that the resting membrane […]

Question: Vinblastine is a pharmaceutical used to treat several cancers, such as lung and breast cancer and Hodgkin’s lymphoma. It binds tubulin, a protein found in microtubules of the cytoskeleton, and prevents the proper formation of the mitotic spindle and the kinetochore. Cancer cell reproduce very rapidly, the drug is used […]

A biologist was testing E. coli for thymidine requirement. She found a thy- point mutant and wanted to study reversion to thy+. She grew 20 cultures of the thy- mutant strain and plated them onto 20 plates that contained media to select for thy+ revertants. She obtained a total of […]