Mendel and How Genetics Developed Flashcards

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Who was Gregor Mendel?

He was an Austrian monk who studied how traits are inherited.

What organism did Mendel use to study inheritance, and why was it useful?

He used pea plants because they grow quickly and show clear, different traits.

What ratio of tall to short pea plants did Mendel see in the second generation?

He saw about three tall plants for every one short plant (a 3:1 ratio).

What name did Mendel give to the things that are passed from parents to offspring?

He called them 'hereditary units' that control each characteristic.

What do we now call Mendel's 'units' of inheritance?

We now call them genes.

Why did many scientists at the time not accept Mendel's ideas?

They did not know about genes or chromosomes, so his ideas seemed strange.

How did the discovery of chromosomes support Mendel's work?

Scientists found that chromosomes come in pairs and separate, just like Mendel's units.

How did the discovery of DNA help develop Mendel's ideas?

It showed that genes are sections of DNA, giving a physical basis for inheritance.

In what way did Mendel's work start modern genetics?

He was first to use careful experiments and maths to explain inheritance patterns.

What does Mendel's story show about how scientific ideas develop?

Ideas may be rejected at first but accepted later when new evidence appears.