Lampbrush chromosome
(Science: cell biology) large chromosomes (as long as 1mm), actually meiotic bivalents, seen during prophase of the extended meiosis in the oocytes of some amphibia.
segments of dna form loops in pairs along the sides of the sister chromosomes, giving them a brush like appearance. These loops are not permanent structures but are formed by the unwinding of chromomeres and represent sites of very active rna synthesis.
Lampbrush chromosome (Science: cell biology) large chromosomes (as long as 1mm), actually meiotic bivalents, seen during prophase of the extended meiosis in the oocytes of some amphibia. segments of dna form loops in pairs along the sides of the sister chromosomes, giving them a brush like appearance. These loops are not permanent structures but are..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
