声明
发表于 2025-3-26 23:14:39
Chromosomal Replicons of Higher Plants,ely correlated with the amount of nuclear DNA (Van’t Hof and Sparrow, 1963) and it has been 22 years since it was shown that the duration of S phase is likewise dependent on the genome size of higher plants (Van’t Hof, 1965)• These correlations were confirmed independently by others (Bennett, 1972;
inscribe
发表于 2025-3-27 04:35:00
New Perspectives on the Genetics and Molecular Biology of Constitutive Heterochromatin,erochromatic chromosome regions. Classical, or constitutive (Brown,1966), heterochromatin was first clearly defined by Heitz (1928), and its biological roles have been debated ever since. Constitutive heterochromatin is defined cytologically - whole chromosomes or chromosome segments which maintain
Offensive
发表于 2025-3-27 06:35:24
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多骨
发表于 2025-3-27 09:45:42
Distribution Patterns of Nonhistone Chromosomal Proteins on Polytene Chromosomes: Functional Correlnetic map has been established. In many of the larval tissues of Drosophila the cells become quite large; the DNA replicates, but rather than separating, the sister chromatids remain synapsed through several rounds (up to ten) of replication, resulting in large polytene chromosomes which are easily
思想
发表于 2025-3-27 17:34:52
Molecular Mapping of Plant Chromosomes,and include several hundred markers each (O’Brien, 1986). It is an arduous task to construct a genetic map and their existence is a tribute to the dedication of the geneticists and breeders who have made it their labor. The techniques of molecular biology have recently offered a more rapid approach
Apogee
发表于 2025-3-27 19:55:19
Transgenic Arabidopsis,tiveness is quite remarkable in as much as the rate mutation when either one of the three known recessive alleles become homozygous, increases by afactor of about 10.over the spontaneous level. The mutator activity is revealed by the numerous green, yellow and white sectors on the leaves and stems o
novelty
发表于 2025-3-28 00:53:33
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GRIN
发表于 2025-3-28 03:59:59
Quantitative Cladistic Analyses of Chromosomal Banding Data Among Species in Three Orders of Mammalocedures. For example, Q-banding (Caspersson, et al., 1970), G-banding (Seabright, 1971), and R- banding (Dutrillaux and Lejeune, 1971) all produce longitudinal chromosomal differentiation, enabling the identification of homologous elements both within and between species. C-banding provides determi
抵制
发表于 2025-3-28 08:08:00
Regulation of Drosophila Chorion Gene Amplification,on has been elucidated in detail. DNA replication in these systems initiates at specific origin sequences following the binding of proteins that facilitate assembly of an active complex of replication enzymes. RNA transcripts produced at or near the origin sometimes also participate in controlling r
小臼
发表于 2025-3-28 14:29:20
Molecular Cloning of the Maize , Allele by Transposon Tagging with ,,leles of the . locus have been described, each determining a different pattern of pigment distribution in the plant. Genetic studies have lead to the proposal that . is a complex locus containing several similar but functionally distinct modules that regulate anthocyanin expression in specific organ