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Explain Crossing Over in genetics?
Crossing over is when the arms of homologous chromosomes exchange segments (and therefore genes) with each other. Recall that one of the homologues originally came from the father's sperm and the other came from the mother's egg.
During Prophase I of Meiosis the homologous chromosomes pair up to form a tetrad. The arms of the chromatids overlap, and can sometimes swap portions. This exchange results in a genetic recombination of the parental genes, providing for genetic variation, the raw material for evolution.
Differential reinforcement of other behaviour (DRO) This is used to decrease frequent behaviour by reinforcing any behaviour other than the undesired one. An instance would be r
Q. What is the prothallus of pteridophytes? The gametophyte develops by mitosis from a spore and Prothallus is the pteridophyte gametophyte (the haploid individual that forms g
Q. Of what units are the nucleic acids constituted? What are chemical entities that compose that unit? The Nucleic acids are formed by sequences of nucleotides. Nucleotides
The transport system in earthworm The scientific name of earthworm is megascolex. It consists of hearts, blood vessel and blood. There are 8 pairs of hearts in the earthw
Determine Vitamin A requirements of school children and adolescents? The vitamin A requirement of children and adolescents has been computed from growth curve interpolation dat
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Simple sedimentation: The process of removal of suspended, colloidal impurities by allowing water to stand undisturbed in big tanks about 5m deep. Most of the suspended particl
Mental Health For physiological health & social status, it is necessary to maintain mental health. Mental illness is characterised by - Depression Insomnia Exces
Bone grafting issues Planning of the case is very critical. Any bone defect in the aesthetic zone should be evaluated prior to implant placement in order to obtain a prosthetic
How would you design, in principle, an experiment to test the hypothesis that a particular variety of lettuce seed required daylight in order to germinate You would requi
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