Can also occur spontaneously. Lost because mobility is gone due to not being attached to a centromere. Genetic Effects 1. sterility or reduced fertility. Severe mental retardation- cry is similar to a cat.
Duplications occurs when a portion of a chromosome is represented more than twice in a diploid cell.
Specifically-longitudinal repeats of chromosome segments. Unequal Crossing Over Useful in detecting unusual dosages of genes. Bar Eye in Drosophila Phenotypic effect where size of the eye is reduced. Bar gene delays the time for the onset of cell divisions begin in the formation of the eye. Whenever a chromosome rearrangement alters the placement of genes- an altered phenotype results.