Cri-du- chat syndrome- Deletion on 5, short arm

Wolf– Hirschhorn syndrome- Deletion on 4, short arm

Williams– Beuren syndrome - Deletion on 7, long arm

Prader– Willi syndrome- Deletion on 15 long arm 

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#Unit 8. Inheritance Biology

COMPOUND CHROMOSOMES  Sometimes one chromosome fuses with its homologue, or two sister chromatids become attached to each other, forming a single genetic unit.

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TRANSLOCATIONS IN MEIOSIS The effect of a translocation on chromosome segregation in meiosis depends on the nature of the translocation.

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It can be identified by G banding chromosome. 

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Philadelphia chromosome

Reciprocal translocation between the long arm of chromosome 22 and the tip of the long arm of chromosome 9. This translocation produces a shortened chromosome 22, called the Philadelphia chromosome.