JOURNEY INTO DNA ANSWERS Go to As you journey into DNA, answer these questions in your composition notebook: 1) About how many cells are in the human body? 100,000,000,000,000 2) In what cells is the human genome located? Every cell in the body except red blood cells 3) What makes red blood cells exceptions to all other cells? No nucleus, no nuclear DNA 4) What does it mean for a cell to be specialized? Perform different functions (nerve, blood, liver...) 5) How does an undifferentiated embryonic cell become specialized? Turning on/off different sections of DNA 6) Why is the cell’s nucleus called its control center? Regulates growth, metabolism, reproduction, stores DNA 7) Where are chromosomes located? In the cell nucleus 8) How many sets of chromosomes make up the human genome? 2 9) How many pairs of chromosomes are there? 23 10) Where do the sets come from? Two parents 11) How do we understand 97% of the genome? Sequences that don’t code for protein, have no known function 12) In this tutorial, the genome is said to have how many genes?