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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.
what so special for phylum annelida
a) Name the mineral elements needed by (i) bones, (ii) red blood cells, (iii) the thyroid gland b) Which of these elements is (i) present in milk, (b) lacking in milk?
Q. What is the spinal cord? Of which elements is the spinal cord constituted? The spinal cord is the dorsal neural cord of vertebrates it is the part of the central nervous sys
Mitral valve prolapse (MVP) has emerged as a prominent, predisposing structural cardiac abnormality and in adults accounts for 7 to 30 per cent of NVE in cases not related to drug
DNA sequencing is the process of reading the nucleotide bases in a DNA molecule. It includes any technology or method which is used to verify the order of the four bases- guanine,
Explain the Metabolic Aberrations of Underweight? When energy intake falls below the minimal requirements, the body responds with an orderly physiologic adaptation involving th
B l ac k q u ar t e r The disease is otherwise known as black leg or emphysematous gangrene, and it is associated with severe toxaemia, emphysematous swelling of muscl
Action potentials include changes in the membrane potential of an axon, as shown in the schematic below. During the refractory period, sodium channels are inactivated and
If a diploid sperm fertilized a haploid egg, what would the result be? a.Haploid (n) b.Diploid (2n) c.A mixture of diploid (2n) and haploid (n) d.Triploid (3n)
What are varices? Why are they more common in the inferior limbs? Varix means abnormal enlargement of veins. Varices happen when excessive pressure against the normal blood fl
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