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Biology

WCHS Biology Chapter 12

WordDefinition
Pedigree graphic representation of genetic inheritance used by geneticists 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 heterozygote is intermediate between those of the two homozgotes; neither allele of the pair is dominant but combine and display a new trait
Codominant Allele pattern where phenotypes of both homozygote parents are produced in heterozygous offspring so that both alleles are equally expressed
Multiple Allele presence of more that two alleles for a genetic trait
Autosome pairs of matching homologous chromosomes in somatic cells
Sex Chromosome in humans, the 23rd pair of chromosomes; determine 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 of different chromosomes
Karyotype chart of metaphase chromosome pairs arranged according to length and location of the centromere; used to pinpoint unusual chromosome numbers
Created by: dmoudy
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