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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.
The neurotransmitter found in insects that is similar to dopamine is?
Q. How Time affecting taste quality? Time- Time is another factor which affects sensation. Salt on tongue is sensed in a fraction of a second; whereas, bitter things may requir
Compared to amphibians what is an example of evolutionary novelty present in beings of the class Reptilia against the loss of water through the skin? The reptile skin is kerat
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
transport systerms
How to make and why one needs to make cDNA library??
The Upper Border of the Heart A: Mark a point on the lower border of the left second costal cartilage 1.2 cm away from the sternal margin. B: Mark a point on the upper bord
PRINCIPLES OF DARWINISM - 1 . OVERPRODUCTION (PRODIGALITY) - All organisms have enormous fertility and they multiply in geometric ratio. Examples of over product
Explain Theory or Principle of Determination of Coliforms? Coliforms are gram negative, non-spore forming, facultative anaerobic bacteria which produce acid and gas on lactose
Describe the Intensity of S 2 in second heart ? Loud A 2 occurs in patients with hypertension, when aorta is closer to anterior chest wall owing to root dilatation or TGA or
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