Lesson 14: Genetics Flashcards

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1
Q

What sort of experiments did Gregor Mendel carry out in the mid- 19th century?

A
  • 19th century: Gregor Mendel carried out breeding experiments on plants.
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2
Q

What was one of the observations from Gregor Mendel’s experiments where he bred plants?

A
  • One of his observations was that the inheritence of each characteristic is determined by “units” that are passed on to descendents unchanged.
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3
Q

What was observed in the late 19th century?

A
  • In the late 19th century behaviour of chromosomes during cell division
    was observed.
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4
Q

What was observed in the early 20th century? What idea did this lead to?

A
  • In the early- 20th century, it was observed that chromosomes and Mendel’s units behaved in similar ways.
  • This led to the idea that the units, now called genes, were located on chromosomes.
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5
Q

What was determined and the mechanism of what was worked out in the mid-20th century?

A
  • In the mid-20th century the structure of DNA was determined and the mechanism of gene function worked out.
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6
Q

What led to the gene theory being developed?

A
  • This scientific work by many scientists led to the gene theory being
    developed.
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7
Q

Why was the importance of Mendel’s discovery only recognised after his death?

A
  • At the time, scientists did not understand how inheritene worked (DNA hadn’t been discovered yet.)
  • Many scientists believed that characteristics were “blended” when inherited.
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