Prior to the first true chicken, there were non-chickens. The DNA changes came about in cells housed in the egg. So the egg came first. In July 2010, British scientists, using a supercomputer, claimed to have come up with the final and definitive answer.
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During anaphase 2, the chromosomes' centromeres break, and the spindle fibers pull the chromatids apart. The two split portions of the cells are officially known as "sister chromosomes" at this point.
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Answer:An acquired trait is defined as a characteristic or trait that produces a phenotype that is a result of environmental influence. Acquired traits are not coded in the DNA of an individual and therefore most scientists believe they cannot be passed down to offspring during reproduction
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Answer:
include the brain and spinal cord
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