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Chapter 25


allele alternative form of a gene
autosomes non sex chromosomes
carrier someone who carries a normal gene along with its recessive allele
genes segments of DNA that contain the traits each person inherits
genetics the study of heredity or inheritance
genome a complete set of genetic information for one person
genotype the genetic information stored at the locus of a gene, even if those traits are not expressed
heredity the passing of traits form biological parents to children
heterozygous possessing different alleles at a given locus
homozygous possessing similar alleles at a given locus
homologous similar in structure, such as two similar chromosomes that are paired together
karyotype a chart showing all the chromosomes arranged in order by size and structure
locus the location of a specific gene on a chromosome
mutation a permanent change in genetic material
nondisjunction when chromosomes fail to separate during meiosis
phenotype the detectable, outward manifestation of a genotype
polygenic inheritance phenomenon whereby genes at two or more loci contribute to the expression of a single trait
sec chromosomes chromosomes designated by the letters X and Y determine gender
Created by: lindstromjPN110