How to calculate probability of genetic disease

Key terms Pedigree Chart that shows the presence or absence of a trait within a family across generations Genotype The genetic makeup of an organism (ex: TT) Phenotype The physical characteristics of an organism (ex: tall) Dominant allele Allele that is phenotypically expressed over another allele Recessive allele Allele that is only expressed in absence of a dominant allele Autosomal trait Trait that is located on an autosome (nonsex chromosome) Sexlinked trait Trait that is located on one of the two sex chromosomes Homozygous Having two identical alleles for a particular gene Heterozygous Having two different alleles for a particular gene , pedigree, genotype, phenotype, DominantAllele, RecessiveAllele, AutosomalTrait, SexlinkedTrait, homozygous, Heterozygous