Posts tagged DNA

The Twisting Tale of DNA

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Students join their DNA strands together to show the double helix structure of DNA.

Students join their DNA strands together to show the double helix structure of DNA.

This week in G9 Biology we started the second topic on Biological molecules, Enzymes and Animal Nutrition. The first biological molecule we discussed was Deoxyribose nucleic acid (DNA). This is the ultimate information storage and retrieval molecule. DNA has the blueprint for making proteins and ultimately almost all life on Earth. We discussed the structure of DNA and the importance of complementary base pairing (A with T and C with G) by using pipe cleaners as a model. Finally we referred back to Topic 1 as we discussed how DNA barcoding is based on analyzing the sequence of DNA bases to identify and classify organisms based on how similar their sequences are.

The 44 Chromosome Man

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Healthy 44 Chromosome Man

In light of the new genetics IGCSE topic we have just started, there are exceptions to most rules in biology. The inheritance of lore or less chromosomes is not always a major problem and may have played a part in human evolution. Click here for more information.

 

 

 

Albino Animals- example of mutation ans/or inheritance of rare recessive alleles

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albino_gorilla_1sfw

Snowflake the Albino Gorilla

Albino animals are rare but many can be found around the world in zoos. They are the result of the inheritance of 2 recessive alleles or a mutation in the gene for the pigment melanin. To find out more click here.

albino_alligator_1sfw

Albino Aligator

Also click here to read a article from the Daily Telegraph on Albino Animals

 

 

 

Term 3: Double Helix Club, Kiwi DNA and DNA models

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Double Helix Club 8: Extracting DNA from Kiwi fruit and making models of DNA.

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Although we did not extract a lot of DNA today, you can try this experiment again at home.

http://www.thenakedscientists.com/HTML/content/kitchenscience/exp/how-to-extract-dna-from-a-kiwi-fruit/

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