Non-random association between gene arrangements was referred to as linkage disequilibrium by Lewontin and Kojima (1960) and according to them this happens due to linkage between such arrangements. Chromosomal polymorphism in association with allozymes has been extensively studied in Drosophila (Rodriguez-Trelles, 2003; Iriarte et al., 2002; Rodriguez et al., 2000; Kamping and Delden, 1999; Zap...

uterine leiomyomas/fibroids are the most common pelvic tumors of the female genital tract. the initiators remaining unknown, estrogens and progesterone are considered as promoters of fibroid growth. fibroids are monoclonal tumors showing 40-50% karyo-typically detectable chromosomal abnormalities. cytogenetic aberrations involving chromosomes 6, 7, 12 and 14 constitute the major chromosome abno...

background: different studies show that chromosomal balance translocation in the parents can cause recurrent spontaneous abortions. incidence of chromosomal translocation abnormalities in couples with repeated abortions is from 0% to 31%. objective: the purpose of this research was studying the presence or absence of chromosomal abnormalities and heteromorphism in couples with recurrent abortio...

C YTOLOGICAL studies of natural populations are revealing an increasing number of species, both plant and animal, whose populations are characterized by polymorphism for chromosomal rearrangements. Recent examples, for instance, have been found in the marine snail Purpura lapillus by STAIGER (1954), in the grasshopper Moraba scurra by WHITE (1956), in two species of cockmaches (LEWIS and JOHN 1...

Abstract In this paper, we introduce the notion of a complete hypertetrahedral arrangement $${\mathcal {A}}$$ A in $${\mathbb {P}}^{n}$$ P n . We address two basic problems. First, describe local freeness terms smaller arrangement...