Introduction to DNA. Question: From your on-line computer activity, what do you know about the...
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![Page 1: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/1.jpg)
Introduction to DNA
![Page 2: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/2.jpg)
Question:
• From your on-line computer activity, what do you know about the structure of DNA?
![Page 3: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/3.jpg)
Structure of DNA
• DNA is a polymer of what????
![Page 4: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/4.jpg)
Nuclotides!
![Page 5: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/5.jpg)
There are two types of bases:
Adenine & Guanine ( A & G ) =
Thymine & Cytosine( T & C) =
![Page 6: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/6.jpg)
There are two types of bases:
![Page 7: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/7.jpg)
Intro to DNA• Chromosomes exist
in “matching pairs” in the nucleus of a cell
• Scientists call the matching pairs “homologous pairs”.
• In every human body cell, there are 23 homologous pairs of chromosomes.
![Page 8: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/8.jpg)
Example of a human Karyotype
IN HUMANS
Pair # 1- 22 = “autosomes”
Pair #23 = “Sex chromosomes”* XX =
* XY =
![Page 9: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/9.jpg)
Karyotype
• What does the prefix “homo” mean?
• How are homologs similar?#1#2#3#4
![Page 10: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/10.jpg)
Karyotype
Q: How are homologs different????
• GENE –
A:
![Page 11: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/11.jpg)
IMPORTANT !!• All 46 chromosomes
are present in every human body cell!!! Therefore
• All 30,000 genes pairs which make up a human are in every human body cell!
![Page 12: Introduction to DNA. Question: From your on-line computer activity, what do you know about the structure of DNA?](https://reader033.fdocuments.us/reader033/viewer/2022051007/5a4d1b2d7f8b9ab059999d7d/html5/thumbnails/12.jpg)
IMPORTANT !!• Genome –
• *** Every body cell of an organism contains its entire genome !!!! *****