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A cross is made between 2 E. coli strains: Hfr arg+ bio+ leu+ (x) F- arg- bio- leu-. Interuppted mating studies show that arg+ enteres the recipient last, so arg+ recombinants are selected on a medium containing bio and leu only. The recombinants are tested for the presence of bio+ […]

An organism of the genotype AaBbCc was testcrossed to a triply recessive organism (aabbcc). The genotypes of the progeny are presented in the following table. 5 AaBbCc 5 AaBbcc 5 aabbCc 5 aabbcc 20 AabbCc 20 Aabbcc 20 aaBbCc 20 aaBbcc I need help with Part C and D A) If these three […]

A lilly from a true-breeding line with white flowers and short corollas (line A) is crossed to a lilly from a true-breeding line with black flowers and long corollas (line B). The resulting offspring, the F1, are all red-flowered, with corollas of medium length. Suppose an individual from the F1 […]

Part I: You are part of a part of a team that is designing a new cell in the laboratory. Unfortunately, money is tight and there may not be enough funding to create a cell with all of the cell structures and substances that you’ve learned about in the course […]