Answer:
Crossing over increases the genetic variation
Errors in crossover formation result in chromosomal rearrangements (duplications and deletions) and may also cause chromosome nondisjunction
Explanation:
Crossing over, also known as recombination, refers to the exchange of genetic material (DNA) between non-sister chromatids of homologous chromosomes during meiosis. Crossing over increases the genetic variation of the resulting gametes, allowing different genetic combinations to be passed from parents to offspring. Unequal crossing over is a type of error associated with chromosomal duplication and/or deletion events. Unequal crossing over occurs when homologous sequences are not paired precisely. Moreover, errors in crossing over may also cause chromosome nondisjunction, thereby leading to aneuploidies.
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Answer:
Option-C
Explanation:
The phospholipids are the major constituents of the cell membrane of a cell. The phospholipids contains the glycerol attached to the phosphate group and forms the hydrophilic heads whereas the fatty acid tails from the hydrophobic portion of the membrane.
The hydrophobic head face outwards whereas the tails face inwards. The structure of the membrane as arranged in bi lipid layer form and in such a way that the membrane molecules can move. The other molecules present in the membrane like the proteins can drift in the membrane.
Thus, Option-C is correct.
Answer: Barotrauma
Explanation: Barotrauma refers to injuries caused by increased air or water pressure,
