Development of Understanding of Genetics & Evolution (AQA GCSE Biology): Flashcards
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Who was Gregor Mendel?
Who was Gregor Mendel?
Austrian monk who discovered the basics of inheritance
What organism did Mendel use for his experiments?
What organism did Mendel use for his experiments?
Pea plants
Why did Mendel choose pea plants?
Why did Mendel choose pea plants?
Easy to grow and control
What characteristic of pea plants did Mendel study?
What characteristic of pea plants did Mendel study?
Plant height (tall vs dwarf)
What are pure-bred plants?
What are pure-bred plants?
Always produce identical offspring when bred with same type
F1 result: tall × dwarf
F1 result: tall × dwarf
All offspring were tall
What is a dominant trait?
What is a dominant trait?
Trait that shows and hides the recessive trait
What is a recessive trait?
What is a recessive trait?
Hidden trait but still present
F2 tall:dwarf ratio
F2 tall:dwarf ratio
3:1 (three tall : one dwarf)
What term did Mendel use for genes?
What term did Mendel use for genes?
Factors
What are the key properties of Mendel's factors?
What are the key properties of Mendel's factors?
Passed from parents, don't mix, can be dominant/recessive
When did Mendel publish his work?
When did Mendel publish his work?
1865
Why wasn't Mendel recognized initially?
Why wasn't Mendel recognized initially?
Science not advanced enough & ideas too new