A cytogenetic study of familial deafness.

The segregation of human chromosome polymorphisms

“…Fitzgerald (1973) has reported a family in which a 9qh+ chromosome was segregating; the progeny of known carriers were 14 carriers and 7 non-carriers. Although in itself this result does not differ significantly from that expected, when the data are combined with those of Dar & Winter (1969) and Palmer & Schroeder (1971), a ratio of 25 carriers to 10 non-carriers is obtained (segregation ratio 0.7) and this is significant at the 2 % level. We have studied four such families.…”

Childhood deafness in southern Africa

“…The proportions of children within the various categories of deafness differ to some extent in all reported surveys (Lindenhov, 1945;Sank, 1963;Fraser, 1964;Dar and Winter, 1969;Chung and Brown, 1970). Factors responsible for these discrepancies include variance in criteria for selection, different standards of health care, and variation in the genetic constitution of the respective populations.…”

A Study of Dermatoglyphics and the Simian Crease in Familial Deafness

“…The controls (C) were 979 school children with normal hearing, 456 of whom were examined for detailed derm atoglyphic features and for the presence of a simian crease on prints and by inspection, and 523 for the presence of a simian crease by inspection alone (table I). The 3 studied groups are thus FD , U F and C. O ther genetic aspects of the FD group bave been reported [2]. …”

“…In a recent stu d y of 302 deaf-m utes, T u r p i n et al [ 1 ] claim ed there was a difference in the frequency of derm atoglyphic features between 73 p atients w ith familial deafness and those with non-fainilial deafness and controls. An investigation of familial deafness in N orthern Israel [2] included a derm atoglyphic study. This paper reports our findings.…”