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Modern Genetics

Chapter 4 Vocabulary Terms

multiple alleles Three or more forms of a gene that code for a single trait.
sex-linked gene a gene that is carried on the X or Y chromosome.
carrier a person who has one recessive allele for a trait and one dominant allele, but does not have the trait.
pedigree a chart or "family tree" that tracks which members of a family have a particular trait.
genetic disorder an abnormal condition that a person inherits through genes or chromosomes.
amniocentesis a technique by which a small amount of the fluid that surrounds a developing baby is removed; the fluid is analyzed to determine whether the baby will have a genetic disorder.
karyotype a picture of all the chromosomes in a cell arranged in pairs.
selective breeding the process of selecting a few organisms with desired traits to serve as parents of the next generation.
inbreeding a selective breeding method in which two individuals with identical or similar sets of alleles are crossed.
hybridization a selective breeding method in which two genetically different individuals are crossed.
clone an organism that is genetically identical to the organism from which it was produced.
genetic engineering the transfer of a gene fro the DNA of one organism into another organism, in order to produce an organism with desired traits.
gene therapy the insertion of working copies of a gene into the cells of a person with a genetic disorder in an attempt to correct the disorder.
genome All of the DNA in one cell of an organism.
Created by: melaniebird