| A | B |
|---|
| pedigree | graphic representation of genetic inheritance used by genetics to map genetic traits |
| carrier | an individual heterozygous for a specific trait |
| fetus | a developing mammal from nine weeks to birth |
| incomplete dominance | inheritance pattern where the phenotype of a heterozygous is intermediate between those of the two homozygous; neither allel of the pair is dominant but combine and display a new trait |
| codominant alleles | pattern where the phenotypes of both homozygote parents are produced in heterozygous offspring so thatboth alleles are equally expressed |
| multiple alleles | presence of more than two alleles for a genetic trait |
| autosome | pairs of matching homologous chromosome in somatic cells |
| sex chromosome | in humans, the 23rd pair of chromosmes; determines the sex of an individual and carry sex-linked characteristics |
| sex-linked trait | traits controlled by genes located on sex chromosomes |
| polygenic inheritance | inheritance pattern of a trait controlled by two or more genes; genes may be on the same or different chromosomes |
| karyotype | chart of metaphase chromosome pairs arranged according to length and location of the centromere; used to pinpoint unusual chromosome numbers in cells |
