So there are about 180 zinc cents / pennies per pound. Those numbers of pennies per pound are of course for new, uncirculated, zinc or copper cents. When minted, new copper cents weigh about 3.11 grams each and new zinc cents about 2.5 grams each and that is our basis for the number of pennies in a pound.However, once they are put in circulation, they start to ware thinner and thinner.hose numbers of pennies per pound are of course for new, uncirculated, zinc or copper cents. When minted, new copper cents weigh about 3.11 grams each and new zinc cents about 2.5 grams each and that is our basis for the number of pennies in a pound.
Myth No. 1: There is an addiction gene. There is no single gene, or set of genes, that determines whether or not a person will become an addict. And even if a person's parents are addicts, it doesn't mean they will be too. Current addiction research shows that roughly 50% of addiction tendencies are attributable to genes.
Discovering Addiction Genes. Many genes with roles in addiction were identified with the help of animal models, especially mice. Because the reward pathwayâand many of the genes that underlie itâfunctions in much the same way in mice as it does in people, mice are leading the way in identifying addiction genes. When researchers discover a gene that plays a role in addiction in a model organism, such as mouse or fruit fly, they can then identify the counterpart gene in humans by looking for similar DNA sequences. To the right, you will find a sampling of some of the genes suspected to play a role in addiction, many of which were identified first in animals. 1  The A1 allele of the dopamine receptor gene DRD2 is more common in people addicted to alcohol or cocaine.