DNA – Episode 1 of 5: The Secret of Life – PBS Documentary…

DNA – Episode 1 of 5: The Secret of Life – PBS Documentary Your assignment for this weeks Laboratory activity is to watch the video “Secret of Life” it is episode 1 of a 5 part series that was on PBS. This weeks activities and reading included a little about the history of how DNA was discovered (14.1-14.2). This engaging video has interviews with many of the scientists involved. What you read is not the whole story, the true story plays out like a soap opera. Watch the video (about 50 min) and submit a short summary 2-3 paragraphs of the video in your own words as well as your thoughts.  Note this will be turned in through the Turn it in feature of blackboard that looks for Plagiarism, just be sure to use your own words and thoughts.

In the shepherd’s-purse plant (Capsella bursa-pastoris), see…

In the shepherd’s-purse plant (Capsella bursa-pastoris), seed shape is controlled by two genes, A and B. When both the A and B loci are homozygous recessive (aabb), the seeds are ovoid. However, if the dominant allele for either or both of these genes is present, the seeds are triangular. Based on this information, what are the expected phenotypic ratios for a cross between plants that are heterozygous for both traits?