Direct duplication of the Y chromosome with normal phenotype – incidental finding in two cases

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Abstract

Structural rearrangement in the Y chromosome is closely involved in spermatogenesis. However, several Y chromosome variants may have no deleterious effects on male reproduction. Here, we report two cases of Y chromosomal duplication from incidental findings. Their FISH analysis revealed direct duplication of large segments of short and long arms of the Y chromosome. Nearly two intact Y chromosomes were carried in these two cases with normal phenotype.

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