| A | B |
|---|
| trait | a characteristic feature of an organism |
| acquired traits | something you learn like riding a bike, reading, and writing |
| inherited traits | something you are born with like hair color, eye color, and height |
| pedigree | a diagram that traces the occurrences of a trait in a family |
| gene | a unit of heredity found on a certain place on a chromosome that codes for a certain trait |
| heredity | passing the gene from parents to offspring |
| alleles | the various forms of the same gene |
| phenotype | the physical appearance of an organism |
| genotype | the genes an organism has |
| dominant | an allele that is expressed in the phenotype even if only one copy is present |
| recessive | an allele that is expressed in the phenotype when two copies are present |
| probability | a chance of a specific outcome |
| ratio | compares the relationship between two numbers |
| percentage | a ratio that compares to 100 |
| Punnett Square | illustrates how the parents alleles might combine in the offspring |
| mitosis | the division of our body cells (46 chromosomes) |
| meiosis | division of our sex cells (23 chromosomes) |
| gametes | another word for sex cells |
| fertilization | a sperm and an egg combine to form a new cell |
| mutation | any change in DNA |
