A geneticist is studying two linked genes (P and Q). She obs…

A geneticist is studying two linked genes (P and Q). She observes that the dominant alleles (P and Q) are physically located together on one homologous chromosome, while the recessive alleles (p and q) are located together on the other homologous chromosome. This arrangement best illustrates which linkage phase?

Two pieces of high-density polyethylene [G = 0.75 GPa] tubin…

Two pieces of high-density polyethylene [G = 0.75 GPa] tubing are fitted together and firmly clamped at their ends. A torque of 7.7 N·m is applied to the fitting. Tube (1) is 155 mm long, and tube (2) is 105 mm long. Both tubes have an outsider diameter of 21.0 mm and an inside diameter of 16.0 mm. Determine the magnitude of the torque produced in tube (2).