Discussion:
Genetics: DNA and Chromosome Problems
1. Each cell of the human body contains 46 chromosomes.
a. How many DNA molecules does this statement represent?
b. How many different types of DNA molecules does it represent?
2. DNA is extracted from cells of Neurospora, a fungus that has one set of seven chromosomes; pea, a plant that has two sets of seven chromosomes; and housefly, an animal that has two sets of six chromosomes. If powerful electrophoresis is used to separate the DNA on a gel, how many bands will each of these three species produce?