| A | B |
|---|
| meiosis | the process by which the number of chromosomes is reduced by half to form sex cells |
| messenger RNA | copies the coded message from the DNA in the nucleus, and carries the message into the cytoplasm |
| transfer RNA | carries amino acids and adds them to the growing protein |
| traits | different physical characteristics |
| heredity | the passing of traits from parents to offspring |
| purebred | a purebred plant is one that always produces offspring with the same form of a trait as the parent |
| genes | the factors that control traits |
| alleles | the different forms of a gene |
| dominant allele | one whos trait always shows up in the organism when the allele is present |
| recessive allele | is one that is masked or covered up, whenever the dominant allele is present |
| hybrid | a plant that is hybrid has two different alleles for the trait |
| probability | the likelihood that a particular event will occur |
| punnett square | a chart that shows all the possible combinations of alleles that can result from a genetic cross |
| phenotype | an organism's physical appearance or its visible traits |
| genotype | an organism's genetic makeup of allele combinations |
| homozygous | when an organism has two identical alleles for a trait |
| heterozygous | an organism that has two different alleles for a trait |
| codominance | the alleles are neither dominant nor recessive |
