I have been a life science and STEM teacher for centerville school district in South Dakota for five years. I was selected as the 2021 South Dakota life science teacher of the year. I have also served as the head girls basketball coach and junior high football coach. I have a passion for helping kids better themselves and highly believe in the development of problem solving and thinking skills for young people. I believe STEM develops these skills effectively and is a vital component to kids learning.
List a function of each organ, tissue, and cell type described in this chapter, and then list at least one feature that facilitates that function.
A tumor suppressor protein, $\mathrm{p} 21$, inhibits Cdk $1 .$ The earliest effect of $\mathrm{p} 21$ on the cell cycle would be to stop the cell cycle at:a. early $G_{1}$b. late $G_{1}$c. the S phase.d. $G_{2}$e. the mitotic prophase.
The chromatids separate into chromosomes:a. during prophase.b. going from prophase to metaphase.c. going from anaphase to telophase.d. going from metaphase to anaphase.e. going from telophase to interphase.
You have a means of measuring the amount of DNA in a single cell. You first measure the amount of DNA during G $_{1}$. At what points during the remainder of the cell cycle would you expect the amount of DNA per cell to change?
A cell has 38 chromosomes. After mitosis and cell division, one daughter cell has 39 chromosomes and the other has $37 .$ What might have caused these abnormal chromosome numbers? What effects do you suppose this might have on cell function? Why?
