Crossing over. Parts of sister chromatids will sometimes switch places with the parallel part, resulting in a completely unique DNA sequence.
<span>Antibiotics work by selectively targeting the reproduction or growth of specific bacteria cells and by not attacking human DNA. Antibiotics do not, or should not, target and affect human DNA gyrases, although they should target the specific bacteria growth. The host, (human) DNA needs to remain unharmed while the bacteria does not replicate.</span>
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</span>Most cells of the body have self markers on the surface of their cell called the major histocompatibility complex (MHC). The MHC allows cells of the immune system to recognize the cell as part of our self.<span>system to recognize the cell as part of ourself.</span>
Answer:
The person should be carried in a straight position to prevent damage of spinal cord.
Explanation: