| A | B |
|---|
| gene | an instruction for a characteristic |
| chromosome | made up of many genes and found in the nucleus of every cell |
| Mitosis | simple cell division that in occurs in all cells except sex cells |
| Meiosis | cell division that produces gametes |
| 46 | number of chromosomes in human body cells |
| 23 | number of chromosomes in human gametes |
| alleles | pairs of genes |
| genotype | pattern of alleles for traits |
| phenotype | the way a charactoristic actually apprears |
| heterozygous | alleles are different |
| homozygous | alleles are both the same |
| dominant | an allele which is always expressed when present |
| recessive | an allele which is only expressed when dominant is not present |
| DNA | complex molecule of which genes are made of |
| gametes | sex cells |
| heredity | passing of traits from parents to offspring |
| asexual reproduction | simple cell division producing two identical cells |
| sexual reproduction | cell division in which each gamete ends up with half of the parent's genetic information |
| Mendel | botanist famous for heredity studies |
| genetic traits | genes (charactoristics) that are expressed in an organism |
