Answer to Question 1
Norovirus illustrates the importance of personal hygiene. Norovirus is passed in the stool and vomit of infected people. Thus, infected people who do not wash their hands adequately can pass the virus directly to other people, or they can pass it indirectly by way of contaminated food or water. Outbreaks in the United States are often linked to food touched by infected food handlers or to person-to-person contact in day care centers, in nursing homes, and on cruise ships. People can also be infected with norovirus by eating raw shellfish such as oysters and clams that are grown in sewage-contaminated waters.
Answer to Question 2
d
For linked genes, recombinant frequencies are less than 50 percent
Geometry of bonds when carbon is covalently linked to three or four other atoms
Pedigrees and Sex Linkage Part A - Identifying X-linked inheritance in pedigrees
Examples of Scenarios Involving Nonmoral, Impersonal Moral, and Personal Moral Judgments from the St
Dosimeter or personal radiation badge.
Morgan’s analysis of genetic linkage of X-linked genes for eye color