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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.
Types of Axons Axons are of two types Myelinated and Non-myelinated In the case of myelinated axons the neurilemma is ensheathed by another cover
Types of Cambium On the basis of the arrangement of the Fusiform cells as seen in tangential section, cambium is divided into: A) Storied/Stratified Cambium : The groups o
Explain Mechanism for reduce the absorption of nutrients? The absorption of nutrients is also reduced by mechanisms other than increasing the viscosity of gastrointestinal cont
Describe the process of excitation-contraction coupling (ECC) in the heart. How do adrenaline, noradrenaline and acetylcholine alter heart rate and or force?
Define the Importance of Zinc in Humans? Zinc deficiency in humans was reported by A.S. Prasad among people consuming mostly breads and very little animal protein in Middle Eas
what are carbohydrates
At 1 AM, an impermeable membrane separates a 1 liter solution of 2M KCl in the left compartment from a 1 liter solution containing both 1M NaCl and 1M KCl in the right compartment.
Q What are the few examples of annelids? Earthworms, lugworms and leeches. Q. Which are the morphological features that differentiate the beings of the phylum Annelida from
Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present?
what factor''s do i colour depend on?
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