From a large scale screen of many plants of Collinsia grandiflora,a plant w/ 3 cotyledons was discovered (normally there are 2cotyledons) This plant was crossed w/ a normal pure-breeding w/wild type plant, and 600 seed from this cross were planted. Therewere 298 plants w/ 2 cotyledons , and 302 w/ […]

1. An RNA molecule has the following percentages of bases: A= 23%, U= 42%, C= 21%, G= 14%.a. Is this RNA single stranded or double stranded? How can you tell? b. What would be the percentage of bases in the template strand of the DNA that contains the gene for […]

You have been given several bacterial strains from various countries around the world. It is thought that all the strains cause the same gastrointestinal illness and are genetically identical. After carrying out a DNA finger print analysis of the strains, you find that 4 different strain types are present. How […]

1. Observe the life table of an arthropod. Is this population increasing or decreasing? If the population becomes endangered, at what point should the organism be carefully protected? 2. “Nt = N0 ert, and ln Nt = r t + ln N0“. What do these terms mean? What are the implications and assumptions of this simple statement? Draw a […]