Seed heteromorphism provides plants with alternative strategies for survival in unfavourable environments. However, the response of descendants from heteromorphic seeds to stress has not been well documented. Suaeda aralocaspica is a typical annual halophyte, which produces heteromorphic seeds with disparate forms and different germination characteristics. To gain an understanding of the salt t...

To study the association of chromosomal polymorphic variations with recurrent miscarriage. Recurrent miscarriage becomes a problem that affect an increasing number of couples with the frequency of about 1% in the couples who want to conceive. This study is based on comparison of chromosome Heteromorphism in the karyotypes of two groups. The first group with 400 individuals with the history of m...

In 20 families with a Down's syndrome child, heteromorphism of chromosome 21 was sought in the parents and proband. Information on the meiotic division and the parent of origin was given in 16 families, the majority of errors being maternal in origin, predominantly at meiosis I, though the paternal contribution is also appreciable. Probabilities of parental and meiotic division origin are calcu...

ATURAL populations of D. kikkawai Burla (previously cited as D. montium N d e Meijere) present three different types of polymorphism: (1) a polymorphism (associated with a sexual dimorphism) involving color and pattern of abdominal tergites; (2) a chromosomal polymorphism expressed in a long paracentric inversion in the left arm of chromosome 11; (3) a chromosome heteromorphism in consequence o...

Heterochromatin is one of the most dynamic components in the genome of species. Previous studies on the heterochromatin content and distribution in Heteroptera (insects with holokinetic chromosomes) have shown that the species belonging to the family Coreidae are interesting model organisms since they show very diverse C bands patterns. In the present work, we analyzed the C-band pattern in ind...