Class 15

Today in class we discussed the brine shrimp lab and constructed graphs. We graphed the classes results to see which solution is the Brine Shrimp mostly adapted to. We determined the ideal salt concentration for brine shrimp survival was 0.5 from our data and graph.

We then moved on to an activity that shows how recessive traits lessen while dominant traits increase. We had 50 beads, 25 red and 25 green. These beads represented tigers with no hair and tigers with hair. My partner and I decided that the green ones were the tigers with hair and the red ones were the tigers without hair. We put all beads in a bag and shook it. Without looking we picked out two beads at a time. If it was green, green we put it in the HH container because it is dominant, if it was red red we would put it in the hh container because it is a recessive trait and if it was both we would put it in the Hh container. The ones that were recessive would die. We did this 10 times and recorded how many were in each container. There would always be one red bead present. We also talked about how migration played a role in populations, for example recessive traits such as the tigers with no hair can migrate into an area and then reproduce other tigers with no hair.