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Gregor Mendel
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He saw that the traits were inherited in certain numerical ratios.

He then came up with the idea of dominance and segregation of genes and set out to test it in peas.

It took seven years to cross and score the plants to the thousand to prove the laws of inheritance!

Slide 9

Pictures of atypical plant

Pictures of atypical plant

Slide 10

Mendelís laws of heredity

Mendelís laws of heredity

From his studies, Mendel derived certain basic laws of heredity:

Hereditary factors do not combine, but are passed intact;

Each member of the parental generation transmits only half of its hereditary factors to each offspring (with certain factors "dominant" over others);

Different offspring of the same parents receive different sets of hereditary factors.

Slide 11

YY

YY

GG

YG

YG

YG

YG

Y= Yellow allele

G= Green allele

YY

GG

YG

YG

F1 Generation

F2 Generation

YY

YY

YY

YY

YY

GG

YG

YG

YY

GG

YG

YG

GG

GG

GG

GG

Slide 12

Parent Generation

Parent Generation

F1 Generation

F2 Generation, 3:1 ratio

Slide 13

Mendel's work became the foundation for modern genetics.

Mendel's work became the foundation for modern genetics.

The impact of genetic theory is no longer questioned in anyone's mind.

Many diseases are known to be inherited

and pedigrees are typically traced to determine the probability of passing along an hereditary disease.

Plants are now designed in laboratories to exhibit desired characteristics.

The practical results of Mendel's research has not only changed the way we perceive the world, but also the way we live in it.

Slide 14

Took seven years to prove laws of inheritance

Took seven years to prove laws of inheritance

-Basic Laws-

Heredity Factors do not combine

Each member of a parental generation transfers only one half of its heredity factors to each offspring

Interesting Facts

Slide 15

Mendelís works became the foundation of modern genetics

Mendelís works became the foundation of modern genetics

Later crossed mice and pea plants

Noticed traits were inherited in certain numerical ratios

Came up with idea of dominance and segregation of genes and set out to test it in peas

Love of nature encouraged his interest in research

Also interested in meteorology and theories of evolution

More Interesting Facts

Slide 16

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