In fruit flies, the red eye allele (pr+) is dominant to the purple eye allele (pr) and the normal wings allele (vg+) is dominant to vestigial wing allele (vg). These loci are located on the same chromosome. A pure breeding red-eyed fly with vestigial wings was crossed with a pure-breeding purple-eyed fly with normal wings. All of the F1 progeny had a WT phenotype. Which of the following represents the arrangement of alleles on the F1’s chromosome?

Independent assortment predicts a 9:3:3:1 ratio with four different phenotypes in the F2 progeny.  If the alleles are epistatic, what would you predict?

The hairless allele (HL) in Mexican hairless dogs is dominant. A cross between two Mexican hairless dogs yields offspring which are 1/3 hairy and 2/3 hairless. What do these F1 ratios suggest about the hairless allele HL?

Choose the diagram illustrating the alleles on homologous chromosomes for the genotype DFg/DFG, assuming that the genes reside on the same chromosome in the order written.

What is the definition of high-level disinfection?

What should be done to minimize the risk of infection during tracheal suctioning?

What percentage of hospitalized patients in the United States develop a healthcare-associated infection?

What is a recommended practice for minimizing infection risk with ventilators?

What is an essential characteristic of a room designated for Airborne Infection Isolation?

What precautionary measures are recommended for patients with M. tuberculosis?