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what does it mean to be semi conservative?

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what does it mean to be semi conservative?

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relating to or being genetic replication in which a double-stranded molecule of nucleic acid separates into two single strands each of which serves as a template for the formation of a complementary strand that together with the template forms a complete molecule

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What happens to each strand as it is copied?

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What happens to each strand as it is copied?

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The original strands act as a template for the new strands

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helicase- unzips the double helix
primase- the intializer makes primer
polymerase- replicates dna to build
ligase- the glue

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What is replication? When is it happening? Where is it all happening? 

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What is replication? When is it happening? Where is it all happening? 

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Replication is where more DNA is made.
It occurs in the nucleus of the cell.
It happens during interphase.

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If you unwrap all of your DNA you could reach the moon 600 times.

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Friedrich Miescher, 1869

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Deoxyribonucleic Acid

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Made up of two books, one from each parent.
Genome is another name for it
23 chromosomes in each
Adenine (A),
Guanine (G)
Thymine (T)
Cytosine (C)

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View full lesson: http://ed.ted.com/lessons/dna-the-book-of-you-joe-hanson Your body is made of cells -- but how does a single cell know to become part of your nose, instead of your toes? The answer is in your body's instruction book: DNA.

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the passing on of physical or mental characteristics genetically from one generation to another

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2 long polynucleotide chains
4 types of nucleotide sub-units
five carbon sugar-  deoxyribose
attached to single phosphate group
base could be either adenine (A), cytosine (C), guanine (G), or thymine (T)  (nitrogen containing base

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process where DNA replicates and produces more DNA

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46 in nucleus
23 from mothers egg
23 from fathers sperm

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Human Physiology : How Many Chromosomes Does Each Human Cell Have?

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Human cells have 46 chromosomes that are placed into 23 pairs, with one chromosome of each pair coming from the father and mother separately. Discover what an extra or missing chromosome causes with information from a science teacher in this free video on physiology and the human body.

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Watch this crash course!

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DNA Structure and Replication: Crash Course Biology #10

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instructions for making proteins
proteins do the work within our cells and body
“Fact Sheet 1 An Introduction to DNA, Genes and Chromosomes.” Fact Sheet 1 An Introduction to DNA, Genes and Chromosomes - Centre for Genetics Education, www.genetics.edu.au/publications-and-resources/facts-sheets/fact-sheet-1-an-introduction-to-dna-genes-and-chromosomes/view.

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The order of building blocks in a strand of DNA makes up a "sequence." We can read a DNA sequence like letters in a book. In fact, we know the sequence of the entire human genome-all 3 billion letters. That's enough information to fill roughly 1,000 200-page books!

Contained within the 3 billion letters of the human genome are about 21,000 genes. Most of our known genes code for proteins, but some code for RNA molecules.

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The order of building blocks in a strand of DNA makes up a "sequence." We can read a DNA sequence like letters in a book. In fact, we know the sequence of the entire human genome-all 3 billion letters. That's enough information to fill roughly 1,000 200-page books!