Sappington Science Explorer Cells and Heredity Chapter 4

14 terms by asappington

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multiple alleles

three or more forms of a gene that code for a single trait

sex chromosome

a pair of chromosomes carrying genes that determine whether a person is male or female

sex-linked

a gene that is carried on the X or Y chromosome

carrier

a person who has one recessive allele for a trait, but does not have the trait

genetic disorder

an abnormal condition that a person inherits through genes or chromosomes

pedigree

a chart or "family tree" that tracks which members of a family have a particular trait

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 from 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

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