Summary AQA GCSE Triple: Genetics and evolution

GENETIC S AND EVOLUTION
B I O L O G Y C H A P T E R 1 5

,15.1 THE
H I S T O RY O F
GENETICS
• Mendel’s discoveries

• He had pea plants with different characteristics
and bred them

• He found that the characteristics inherited
were in predictable patterns

• He explained his results by suggesting there
were separate units of inherited material and
some characteristics were dominant over
others

• He found that characteristics skipped
generations

, 15.1 WHY • He used maths to explain his ideas which was
uncommon in those times
DID
• Chromosomes has not yet been discovered
PEOPLE
• Once people has seen chromosomes through a
NOT
microscope his ideas had been accepted
ACCEPT
• After his discoveries:
MENDEL'S
• Research discovered DNA structure (Maurice
IDEAS Wilkins, and Rosalind Franklin,) against (James
Watson, and Francis Crick) – double helix structure