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Mutations are the only kind of variability generating mechanism in prokaryotes and asexually reproducing organisms. But in eukaryotes where sexual recombination occurs, even in one generation there is a marked reshuffling of genes in the chromosomes which amplifies the genetic variability in a population. The kind of variability generated by recombination is tested by natural selection in as many genetic backgrounds as possible and in as short time as possible (say in one generation). Thus one of the greatest and fundamental advantages of sexual reproduction is the generation of variability. Provided the populations are large, even if mutations do not exist, the mechanism of sexual recombination alone would be generating new genotypes for very long time.
Strobilation - Types of Asexual Reproduction Strobilation is a type of asexual reproduction in which successive segments are separated off from the body one after other. It is
Motor Control in Annelids and Arthropods In annelids and arthropods generally, individual metameric ganglia of the ventral nerve cord are capable of initiating and keep locomo
Bioactive Ceramics:- Hydroxyapatite, Tricalcium phosphate, Tetracalcium phosphate, calcium pyrophosphate. Fluorapatite, brushite, bioglass.
Symmetry - Metazoa All living organisms have some body shape and form. The general body plan of animals may be organized in one of several ways . Arrangement of parts or organ
define inflorescence and explain in detail about it''s types
What is biotechnology? Biotechnology is the application of biological knowledge to get new techniques, materials and compounds of pharmaceutical, medical, agrarian, industrial
What is the difference between ectoparasite and endoparasite? Ectoparasites are parasites that explore the external surface of the host (as, for example, mites that parasite th
What is Nagel's Anomaloscope The patient is asked to match a yellow with a mixture of red and green wave lengths. A defect can be detected based on the amount of red and green
MEIOSIS Every organism is mortal, It becomes old and wornout with advancing age (= ageing ) and ultimately dies ,Before death however ,it reproduces its own kind, so
It corresponds to the anterior and inferior interventricular grooves. Its right side is convex and bulges to the right ventricle. The septum has a posterior border which separates
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