3. Principles of Inheritance Flashcards Preview

IB Biology SL > 3. Principles of Inheritance > Flashcards

Flashcards in 3. Principles of Inheritance Deck (2):
1

Who is often regarded as the father of genetics? What did he do?

- Gregor Mendel
- crossed varieties of pea plants that had different characteristics and, from his results, he deduced the principles on which inheritance is based

2

Was Gregor Mendel the first to attempt to deduce the principles of inheritance? If not, why was he successful?

- no

- he obtained numerical rather than descriptive results
- and used large numbers of pea plants (it is important in science to have enough replicates to ensure reliability)

e.g. in 'seed=smooth/wrinkled' example, he counted 7,324 seeds in F2 generation:
- smooth: 5,474
- wrinkled: 1,850
with such large numbers, he could be very confident that the basic ration was 3:1

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