BIOL 117 Chapter Notes - Chapter 15: Gamete, Chromosome, Aneuploidy
Document Summary
According to this theory, mendelian genes have specific loci (positions) on chromosomes, and it is the chromosomes that undergo segregation and independent assortment. The two alleles for each gene separate during gamete formation. Alleles of genes on nonhomologous chromosomes assort independently during gamete formation. Wild type the phenotype for a character most commonly observed in populations. Sex-linked gene a gene located on either sex chromosome. Duchenne muscular dystrophy a sex-linked disorder characterized by a progressive weakening of the muscles and loss of coordination. Hemophilia a sex-linked recessive disorder defined by the absence of one or more of the proteins required for blood clotting. Barr body the inactive x in each cell of a female condenses into a compact object, lies along the inside of the nuclear envelope. Linked genes genes located on the same chromosome that tend to be inherited together in genetic crosses.