INT 1 Task 1

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Part One
Changes in DNA
Understanding - a
Continuing Process
INT - Task 1

Understanding Genetics a
Timeline of DNA Science

1700’s - it is believed that all traits are acquired.
Example - a giraffe has a long neck due to stretching to reach the leaves in the taller trees.
1800’s - Carl Linnaeus classified by visible traits.
1866 - Gregor Mendel, through pea plant breeding and research; discovered that traits are inherited not acquired- before anyone knew or understood anything about “genes”. He published what he discovered as the “principles of inheritance” - however, his ideas were not recognized for over 30 years.
1900’s - Mendel’s experiments are rediscovered, confirmed by three researchers and his paper’s are
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Helens. The Forest Service scientists and collaborators were on the edges of the volcano within 2 weeks of the eruption collecting information and making observations of the volcano and the areas ecology - learning about things science has not had the chance to learn about until this time. Listed below are a few of the things that the eruption of Mount
St. Helens has taught taught scientists:
● This was the first time this type of volcano eruption was actually witnessed and documented in history. In 1956, there was a similar landslide and blast at
Bezymianny volcano in Kamchatka, Russia - however, there were no witnesses to document the actual blast. It wasn’t until Mt. St. Helens that it was recognized that the two blasts were the same style of eruption.
● These “sector collapse” (the name of this type of eruption) have now been identified at over 200 volcanoes around the world. The detailed studies of the sector collapse, the lateral blast, and the large mudflow of this eruption have led to the reassessment of volcano hazards at other sites around the world. This has given these communities a way to become better prepared for future eruptions.
● Studies of Mount St. Helens has also demonstrated that volcanic eruptions can be accurately predicted.

Lessons Learned After the
Eruption of Mount St. Helens

Mt. St. Helens has created the ideal natural laboratory for science observations - over the years the growth of a lava dome in the
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