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Chapter 7
Extending Mendelian Genetics
Question | Answer |
---|---|
carrier | does not show disease symptoms but can pass on the disease-causing allele to offspring |
sex-linked gene | genes that are located on the sex chromosome |
X chromosome inactivation | the process by which, in each cell of a female mammal, on of the two X chromosomes is randomly "turned off" |
incomplete dominance | a heterozygous phenotype is somewhere between the two homologous phenotypes |
codominance | both traits are fully and separately expressed |
polygenetic trait | traits produced by two or more genes |
linkage map | map of the relative locations, or loci, of genes on a chromosome |
pedigree | can help trace the phenotypes and genotypes in a family to determine whether people carry recessive alleles |
karyotype | a picture of all of the chromosomes in a cell |