Results 301 to 310 of about 285,727 (331)
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2008
Somatic embryogenesis, the process in which embryos, similar in morphology to their zygotic counterparts, are induced to develop in culture from somatic cells, is a suitable model system for investigating the regulation of embryo development. Through this process, a large number of embryos at defined stages of development can easily be obtained ...
Sara, von Arnold, David, Clapham
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Somatic embryogenesis, the process in which embryos, similar in morphology to their zygotic counterparts, are induced to develop in culture from somatic cells, is a suitable model system for investigating the regulation of embryo development. Through this process, a large number of embryos at defined stages of development can easily be obtained ...
Sara, von Arnold, David, Clapham
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2018
This chapter examines the essential characteristics of plant embryogenesis and the nature of the mechanisms that guide embryo formation. The sporophytic, or diploid, phase of plant development begins with the formation of a single cell, the zygote, which results from the fusion of the two haploid gametes, egg and sperm. During embryogenesis, the zygote
Lincoln Taiz +3 more
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This chapter examines the essential characteristics of plant embryogenesis and the nature of the mechanisms that guide embryo formation. The sporophytic, or diploid, phase of plant development begins with the formation of a single cell, the zygote, which results from the fusion of the two haploid gametes, egg and sperm. During embryogenesis, the zygote
Lincoln Taiz +3 more
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Journal of Urology, 1975
Gross and microscopic examination of 46 consecutive male therapeutic abortion specimens, ranging in size from 60 to 180 mm. crown-rump, demonstrated that 89 per cent of the fetuses had some ventral curvature of the penis. Athough presumably all penises are ventrally curved through the tenth week of gestation, in our study this curvature was most ...
G W, Kaplan, D L, Lamm
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Gross and microscopic examination of 46 consecutive male therapeutic abortion specimens, ranging in size from 60 to 180 mm. crown-rump, demonstrated that 89 per cent of the fetuses had some ventral curvature of the penis. Athough presumably all penises are ventrally curved through the tenth week of gestation, in our study this curvature was most ...
G W, Kaplan, D L, Lamm
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Embryogenesis of holoprosencephaly
American Journal of Medical Genetics Part A, 2007AbstractHoloprosencephaly (HPE) is a malformation of the human brain caused primarily by incomplete division of the prosencephalon into two halves and is often associated with various facial anomalies. Although HPE is rather rare in newborns (1/10,000–15,000 births), it is frequently encountered in therapeutic abortuses (>1/250).
Kohei, Shiota +3 more
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Nature, 1970
A simple order-of-magnitude calculation suggests that diffusion may be the underlying mechanism in establishing morphogenetic gradients in embryonic development.
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A simple order-of-magnitude calculation suggests that diffusion may be the underlying mechanism in establishing morphogenetic gradients in embryonic development.
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1999
Most of the structures of adult higher plants such as leaves, stems and roots but also the flowers and seeds are formed as a result of the activity of groups of proliferating cells, called meristems. Two primary meristerns, the shoot apical meristem and the root meristem, form during embryogenesis, but later, secondary meristems can develop at specific
Vroemen, C.W., de Vries, S.C.
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Most of the structures of adult higher plants such as leaves, stems and roots but also the flowers and seeds are formed as a result of the activity of groups of proliferating cells, called meristems. Two primary meristerns, the shoot apical meristem and the root meristem, form during embryogenesis, but later, secondary meristems can develop at specific
Vroemen, C.W., de Vries, S.C.
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Science, 2017
Developmental Biology Pluripotent embryonic stem cells (ESCs) can differentiate into any adult cell type; however, aggregates of these cells do not mimic embryonic architecture when grown in culture. To see whether mouse ESCs and their extraembryonic counterparts, trophoblast stem cells (TSCs), can recapitulate normal development, Harrison et al ...
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Developmental Biology Pluripotent embryonic stem cells (ESCs) can differentiate into any adult cell type; however, aggregates of these cells do not mimic embryonic architecture when grown in culture. To see whether mouse ESCs and their extraembryonic counterparts, trophoblast stem cells (TSCs), can recapitulate normal development, Harrison et al ...
openaire +2 more sources