The two year old proband has multiple malformations and severe developmental delay. Her karyotype is 46, XY, -9, +rec(9), dup p, inv(9)(q22.1q34.3)mat, with a net duplication of 9pter←q22.1 and ...

Length and position of breakpoints are characteristics of inversions that can be precisely determined on the polytene chromosomes of Drosophila species, and they provide crucial information about the ...

All mutations and balancer chromosomes are described in Lindsley and Zimm (1992).