Mendel (Edexcel GCSE Biology): Flashcards
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What was Mendel's nationality?
What was Mendel's nationality?
Austrian
When were Mendel's results published?
When were Mendel's results published?
1866
What organism did Mendel experiment on?
What organism did Mendel experiment on?
Pea plants
Result: red x white flowered pea plants (1st gen)
Result: red x white flowered pea plants (1st gen)
All offspring had red flowers
Red flower allele characteristic
Red flower allele characteristic
Dominant
White flower allele characteristic
White flower allele characteristic
Recessive
Mendel's term: what determines characteristics?
Mendel's term: what determines characteristics?
Hereditary units
How are hereditary units passed to offspring?
How are hereditary units passed to offspring?
From both parents, one unit from each
Result: tall x dwarf pea plant (1st gen)
Result: tall x dwarf pea plant (1st gen)
All tall offspring
Ratio of tall:dwarf in 2nd generation
Ratio of tall:dwarf in 2nd generation
3:1
What are 'hereditary units' actually?
What are 'hereditary units' actually?
Genes
Why didn't scientists understand Mendel initially?
Why didn't scientists understand Mendel initially?
No knowledge of genes, DNA & chromosomes
Why not accepted: communication issue
Why not accepted: communication issue
Struggled to communicate findings effectively
Why not accepted: publication issue
Why not accepted: publication issue
Published in obscure scientific journal
Why not accepted: explanation issue
Why not accepted: explanation issue
Unable to explain how traits were inherited