1) Stages of meiosis 减数分裂进程例句>> 2) miosis [英][mai'əusis] [美][maɪ'osɪs] 减数分裂 1. Results indicate that optimum ultrastructural observation can be achieved with the peotoplasts in miosis phase. 本文用常规电镜技术对不同细胞周期的酿酒酵母SaccharomycesCerevisiae菌体细胞和...
However, contextualising findings from yeast, worms, flies and mice can be challenging, due to marked differences in both nomenclature and the relative timing of meiosis. In this review, we set out to combine current knowledge of signalling and transcriptional pathways that control meiosis initiation...
Sexual reproduction is ubiquitous in eukaryotes, but the mechanisms by which sex is determined are diverse and undergo rapid turnovers in short evolutionary timescales. Usually, an embryo’s sex is fated at the moment of fertilisation, but in rare instan
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1 B-ALL is a heterogeneous disease with distinct biological prognostic subgroups classified according to the stage at which BCPs are stalled in differentiation and cytogenetic/molecular markers.1 Importantly, different biological subtypes of B-ALL have distinct causal mechanisms and show different ...
In general, the approach involves isolating and characterising mutants defective in these processes and studying the DNA enzymology of wild type strains, in order to identify the biochemical defect of the mutants. Some radiation sensitive mutants have abnormal genetic recombination and meiosis. These ...
Plant height also correlates with rate of molecular evolution in plants, which may be because taller plants tend to have longer generation times (and so fewer meiosis per unit of time) and slower average growth rates (and so fewer mitoses per unit of time) [53]. Highly reduced holoparasites...
Theoretical models have led to the prediction that parasites should evolve higher mutation rates in order to out-evolve their hosts [1]. This prediction has received support from experimental populations of bacteria [2,3]. But does it also apply to multicellular eukaryotes? A number of molecular...
3. EXPERIMENTS (i) Rescue matings The close c-linkage of the lethal mutation suggests that the lethality arises from a centromere defect which, at the time of meiosis or after causes misdivision, specifically, perhaps, a non-disjunction of one chromosome so that inviable nullisomic or di...