1. When DNA samples A and B were separated by buoyant density centrifugation the two samples migrated 23 and 15 cm, respectively. If DNA B had a GC content of 34%, what was the GC content of DNA A? 2. If Meselson and Stahl found that the ratio of 15N-labeled […]

Fred and Ethel have normally pigmented skin but they have a child who is an albino. They are carriers of a recessive trait = heterozygotes.  STOP – READ THAT LAST SENTENCE AGAIN – YOU ARE GOING TO NEED IT TO ANSWER THE SECOND QUESTION. Use A or a for alleles. […]

Elegans with the mutation sma-2 results in a mutant phenotype characterized  by small body size. You place a hermaphrodite that is homozygous for sma-2 and a hermaphrodite that is homozygous wile-type (+) on a single plate.  Monohybrid Crosses: Crosses in which one pair of alleles is involved.  C &sans with […]

You are the healthcare administrator for a cardiology practice. The cardiologists implant into certain patients, a device that is called a “left ventricular assist device: (LVAD); a mechanical device that assists the left ventricle to pump as much blood as possible into the rest of the body. A LVAD is […]