What is one of three biological components are said to "make you who you are" at the start of the passage?
Genes, DNA, or chromosomes.
True or False: All living organisms are composed of cells.
True
Name two different types of human cells.
nerve cells, hair cells, skin cells, fingernail cells, red blood cells (may vary)
What is the outer border of a cell called?
cell membrane
What liquid material is found inside the cell membrane
Cytoplasm
Where in the cell are chromosomes located?
Inside the nucleus
How many pairs of chromosomes does a typical human cell contain?
23 pairs
How many total chromosomes are in a typical human cell?
46
What are the 22 pairs of chromosomes that look the same in males and females called?
Autosomes
Which numbered pair of chromosomes determines biological sex?
23rd
What sex chromosomes do females have?
XX
What sex chromosomes do males have?
XY
What is DNA short for?
Deoxyribonucleic acid
Describe the shape of DNA.
Double helix
What term is used for the "steps" of the DNA ladder?
Bases
Name the four DNA bases and the letter that stands for each
CG. AT.
