| A | B |
|---|
| gene | segment of DNA that codes for specific heredity trait |
| gamete | reproductive cell |
| allele | different versions of a gene |
| phenotype | physical appearance of trait |
| genotype | set of alleles for a trait |
| dominant | trait that is expressed (shown) |
| recessive | trait that is not expressed when dominant allele is present |
| heterozygous | 2 DIFFERENT alleles together |
| homozygous | 2 of the SAME alleles together |
| sex-linked | occuring on the 23rd chromosome |
| autosomal | occuring on the 1-22nd chromosomes |
| polygenic | many genes influence a trait |
| pedigree | family history that shows how a trait is inherited |
| incomplete dominance | blending of traits |
| co-dominance | sharing of traits |
| karyotype | photograph of chromosomes |
| genetics | branch of biology that focuses on genetics |
| heredity | passing of characters from parents to offspring |
| B of BB | allele |
| RR, Rr, or rr | genotypes |
| red hair | phenotype |
| HH or hh | homozygous |
| Hh | heteozygous |
| RR-red, WW-white, RW-pink | incomplete dominance |
| RR-red, WW-white, RW-speckled | co-dominance |
| XY | sex-linked |
