1/24/2003: Cloned cat not copied

tw · 01-26-2003, 11:37 AM

Think of how cells reproduce. A cell that is to be part of an arm generates another cell, with same DNA, that becomes another arm part. This process continues until suddenly a hand forms. Why. If cell A produces cell B to only be another part of the arm AND if both cells have the exact same DNA, then why does cell W down the arm suddenly build a hand? Why would cell W also not build another 'arm' cell?

Welcome to wider concepts of genetics. The blueprint is there, but other factors contribute to why, suddenly, the next cell is a cuticle or finger nail. Less significant is how the fetus receives nutrition, maternal nurturing, etc. There must be communication between cells as they multiply and undertake new functions. DNA alone does not explain that communication.

01-26-2003, 11:37 AM	#14
tw Read? I only know how to write. Join Date: Jan 2001 Posts: 11,933	Think of how cells reproduce. A cell that is to be part of an arm generates another cell, with same DNA, that becomes another arm part. This process continues until suddenly a hand forms. Why. If cell A produces cell B to only be another part of the arm AND if both cells have the exact same DNA, then why does cell W down the arm suddenly build a hand? Why would cell W also not build another 'arm' cell? Welcome to wider concepts of genetics. The blueprint is there, but other factors contribute to why, suddenly, the next cell is a cuticle or finger nail. Less significant is how the fetus receives nutrition, maternal nurturing, etc. There must be communication between cells as they multiply and undertake new functions. DNA alone does not explain that communication. Last edited by tw; 01-26-2003 at 11:42 AM.

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