How many different phenotypes are possible in a one gene/three allele system that displays codominance to each other?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?