Titlebook: Comparative Mammalian Cytogenetics; An International Con Kurt Benirschke Conference proceedings 1969 Springer-Verlag New York Inc. 1969 Ter

招惹

傾聽

植物學

Species, Speciation and Chromosomes, idea of the nature of species, some of these authors brought more confusion than light to the subject. It is obvious then that an understanding of the meaning of species is a prerequisite of the understanding of the role of chromosomes in speciation. It is for this reason that Dr. Benirschke has in

anesthesia

–scent

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Induced Chromosomal Aberrations with Special Reference to Man, as in chromosome preparations, have greatly facilitated the expansion of this field to the chromosomal level. Four general classes of exogenous agents have been described which are capable of causing chromosome aberrations and, therefore, possibly gene mutations as well: irradiation, viruses, physi

啤酒

Lethal Chromosome Errors,elf through premature death. If the defective state is sufficiently severe, it leads to prenatal death. The severity of lethality due to a chromosomal defect may be expressed in degrees. Chromosome anomalies may conveniently be divided into three groups according to life expectancy of the zygote as

sparse

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insert