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Q. What is the crossing over? And In which period of meiosis does this event occur?
Crossing over is the eventual exchange of chromosomal fragments among homologous chromosomes. The phenomenon takes place in prophase I when homologous chromosomes are paired. Crossing over is of great importance for biodiversity and evolution since it provides recombination of alleles of different genes linked in the same chromosome during cell division by meiosis.
Assessment The severity of symptoms depend on degree of obstruction. In case of severe obstruction, ECG shows right ventricular or biventricular hypertrophy. Cardiac cathet
Q Lower Oesophageal Sphincter? Competency of LES (Lower Oesophageal Sphincter) is important. The pressure of this sphincter is controlled by many factors, one of which is hormo
The kind of epithelium which forms the inner walls of blood vessels is : 1. cuboidal epithelium 2. columnar epithelium 3. ciliated columnar epithelium 4. squamous epith
A few statements about the mechanism of evolution are made. Mark the correct statements. (i) Evolution happens at the individual level as well as population level. (ii
How long is the incubation period of the HIV? What is meant by acute AIDS? The incubation period of the HIV (the time interval among the infection and the beginning of the immu
Hypotension, hyperkalemia, taste disturbance, angiedema, renal insufficiency. In the absence of any symptoms of hypotension, and normal renal function and K + levels, the dosage
Which of the following processes assist in the maintenance of high levels of dissolved solutes in the interstitial spaces of the kidney medulla? A. Net flux of sodium ions from
What is Iris Coloboma Coloboma is a congenital abnormality due to non-fusion of the embryonic choroidal fissure. It can affect any part of the eye and may involve the optic ner
Dissolved oxygen - Aquatic Habitats Oxygen in the terrestrial ecosystems occurs in the atmosphere along with other gases in a certain fixed concentration however, in aquatic e
Menstrual cycle in human beings: 1) The cycle of changes in the female reproductive system that leads to formation of Ovum is called 'menstrual cycle'. It occurs once in 28 to
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