Explain pleiotropy and chromosomal aberrations?

Pleiotropy occurs when expression of a phenotypic character is controlled by many genes.
Chromosomal aberrations are types of disorder shown by the chromosomes alteration in their number or morphology. Chromosomal aberrations includes
i. Translocations
ii. Deletions
iii. Duplications
iv. Inversions
v. Aneuploidies