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What is DNA?

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clisty | Student, Undergraduate | eNoter

Posted January 28, 2009 at 1:53 AM via web

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What is DNA?

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lynn30k | High School Teacher | (Level 3) Associate Educator

Posted January 28, 2009 at 3:46 AM (Answer #1)

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DNA is deoxyribonucleic acid, and is contained in your body's cells. It is a double, long chain of molecules called nucleotides that tell each cell what proteins to make. The DNA itself makes up chromosomes. You have 23 pairs of chromosomes in your cells, and you inherited one of each set from one or the other of your parents.

Most DNA in humans is alike, from person to person, which is why we all look like people. But everyone's is also slightly different, so we are not all exactly the same. The DNA basically tells the cells what kinds of things to make; one part of DNA might code for the polypeptides to make red blood cells, for example, or for brain tissue.

DNA is the genetic material; it makes a starfish look like a starfish, and a pine tree look like a pine tree.

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shoomie | High School Teacher | (Level 1) Adjunct Educator

Posted February 5, 2009 at 5:06 AM (Answer #2)

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DNA is the abbreviation for Deoxyribonucleic acid.  It is a long chain of nucleotides that is inside the nucleus of every cell.  In humans, we have about 6 ft. of it in each cell.  It is very small: sub-microscopic.  Sections of the DNA are called genes.  There are hundreds of genes on each of the 23 pair of chromosomes in our body.  Genes determine our traits.  There are only 4 different nucleotides that make up DNA.  The order and number of the nucleotides for each gene is different and is considered our genetic code.  Scientists use sections of DNA that do not code for traits in DNA fingerprinting--for example, to identify forensic evidence such as blood.

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shyitaliana | Elementary School Teacher | (Level 1) Adjunct Educator

Posted March 10, 2009 at 2:06 PM (Answer #3)

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DNA is the abbreviation of Deoxyribonucleic acid.  DNA is what makes the offspring have similar traits to the parent cells.  The offspring DNA is encoded with 23 pairs of chromosomes.  These chromosomes are called genes.  The genes role is to give us traits of both parent cells.  For example: if your father has brown eyes and your mother has blue eyes, and you come out with brown eyes.  This means that your father's genes/DNA was the dominant over your mother's genes/DNA.  This can be seen from eye color to skin color.  Every cell on you has been encoded with both sets of parents DNA.  We can trace our DNA down our family's history.

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meshe | Student, Undergraduate | eNoter

Posted November 23, 2009 at 3:24 PM (Answer #4)

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DNA STANDS 4 DEOXY RIBO NUCLIC ACID. IT IS PRESENT IN EACH N EVRY CELL OF LIVING CREATURES. IT DETERMINE UR SKINCOLOR ,LENGTH,GENETIC MAKEUP .IT CONSISTS OF DOUBLE HELICAL STRUCTURE AND IS MADE OF SMALL REAPITING UNITS CALLED NUCLEOTIDES CONTAINING THREE MAIN COMPONENTS NITROGENOUS BASE,PHOSPHORIC ACID AND DEOXYRIBOSE SUGER.IT IS MAINLY RESPONSIBLE 4 INHERITANCE OF CHARACTERS 4RM PARENTS 2 OFSPRINGS INCLUDING HERETICAL DISEASES SUCH AS DIABETES MYLITES,COLORBLINDING ETC. IF U NEED MORE  INFORMATIONMSG ME I CAN PROVIDE U. HV A NICE TYM . BYE

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neon-ice-cream | Student, Grade 9 | Honors

Posted January 28, 2009 at 4:39 AM (Answer #5)

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dna is what makes people look the way they do.

it is your genetic makeup like your blueprints

 

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ranger1 | Student, Undergraduate | eNotes Newbie

Posted July 6, 2009 at 8:01 PM (Answer #6)

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DNA is Nucleic acid polymer produced from covelant bonding of nucleotide monomers that contain  the sugar deoxyribose; the genetic material of nearly all organisms.

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selenajones85 | Student, Undergraduate | eNotes Newbie

Posted October 5, 2009 at 3:19 AM (Answer #7)

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Deoxyribonucleic acid, the genetic material in the nuclei of all cells. Chemically it is a polymer of deoxyribonucleotides; the purine bases adenine and guanine, and the pyrimidine bases thymidine and cytidine, linked to deoxyribose phosphate. The sugar-phosphates form a double-stranded helix, with the bases paired internally.

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