1. HAPPY THURSDAY Bellwork: Write down the following question and highlight the key words in the question and answer. The mold Aspergillus flavus grows on grain. A. flavus produces a toxin that binds to DNA in the bodies of animals that eat the grain. The binding of the toxin to DNA blocks the process of transcription, so it directly interferes with the animal’s ability to do which of the following? a)Transport glucose across the cell membrane b)Produce ATP using energy released from glucose c)Transfer proteins from the endoplasmic reticulum to the Golgi complex d)Send mRNA from the nucleus to the ribosomes

2. QUESTION: What factors affect the expression of the gene?

3. Temperature & Gene Expression

4. Water level affects the size of the leaves. Leaves above water are broad, below the water-level are finely divided

5. pH affects color. Acidic soil produces blue flowers and Alkaline soil produces pink. A

6. Stem cell differentiation.

7. What is cancer? Uncontrolled cell growth.

8. Twin Studies What is the genetic make up of identical twins? What have we found out about the expression of the genes in twins? http://www.pbs.org/wgbh/nova/body/epige netics.html http://www.pbs.org/wgbh/nova/body/epige netics.html