Tim J Horder

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The dust-jacket aptly sums up this study by Sir Henry Harris, Emeritus Regius Professor of Medicine and former Head of the Sir William Dunn School of Pathology at Oxford, as "the first scholarly history of research on the genetics of somatic cells". This is an interesting, elegantly presented, and certainly detailed, account of what might be called the flip(More)
Carbon particles and isotopic quail grafts were used as markers to study the salient features of the fate map of the chick forelimb between stages 20 and 27. The grafting technique confirmed the reliability of the carbon method: they both revealed striking asymmetries in which apical mesodermal tissue was progressively displaced in a proximal direction (as(More)
The pathways of selected optic axons were traced in representative urodele, anuran, teleost, reptile, and avian species by filling the fibers with HRP or by tracing, at the light and electron microscopic (EM) level, the degeneration caused by focal retinal or optic nerve lesions. In all species it was shown that fibers retain retinotopic neighborhood(More)
Cut optic axons regenerate into the goldfish tectum by indirect routes. To study the accuracy with which they terminate we made visuotectal maps before and immediately after cutting through the rostral tectum from its medial edge. This severed the normal pathway to medial tectum leaving intact only grossly misrouted axons. In fish mapped in this way, 3(More)