The chromosome numbers and karyotypes of five species the genus Iris distributed in Turkey were analyzed. These taxa are I. aucheri (Baker) Sealy, reticulata var. M. Bieb., persica L., peshmeniana Güner & T. Hall, sarii Schott ex Baker. Two them (I. sari peshmeniana) endemic Turkey. studied determeined as 2n=18 persica), 2n=20 sari), 2n=24 aucheri), 2n=36 reticulata). Haploid lengths varied fro...

A retarded child with multiple malformations was found to have a karyotype 47,XY,de1(11)(11 pter leads to q21:), +mar(11 qter leads to q21::?). The mitotically stable centric marker had no demonstrable C heterochromatin. Phenotype-karyotype correlation and the role of C heterchromatin in phenotypic effects are discussed.