Gregor Mendel
&
Pea Plant
Experiments
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ceId=0d7e1cf7-6597-4cd0-872b-c0c42b99f6a9#quiz/d3c3e1da-8df14dcf-9089-6f79f68e5ba9/done
https://www.youtube.com/watch?v=
Mehz7tCxjSE
The Father of Genetics
 Austrian Monk who
lived in Czech
republic (1800’s)
 He is the founder of
Modern Genetics
 Rules of heredity
He determined how traits are passed
through generations of living things
Traits pass by “invisible factors”
He identified recessive and dominant traits,
which pass from parents to offspring.
Pea Plant Experiments
 Experimented with about 28,000 pea plants
 Experiments over 8 year period
 His pea plant crosses resulted in the
discovery of the rules of heredity
WHY USE PEAS??
 Peas can be grown in a small area
 Peas produce lots of offspring
 You can control their pollination
 Peas produce pure plants
 Only 2 allele choices
 You can easily see the traits
Punnett Square
Genotypes & phenotypes
Using a Punnett Square
 Predicts the likely outcomes of a
genetic cross with the alleles taken
from the parents
 Shows all the genotypes that could
result from a given cross
Monohybrid Cross
 Cross involving a single trait
 All of the crosses involved the alleles
for one gene only
Using Probability
 Likelihood that a specific event will occur
 Probability = # of one kind of possible
outcomes
total # of all possible outcomes
 Probability of a specific allele in a gamete
 Represented as a fraction or ratio
https://www.youtube.com/watc
h?v=PM9JUEVdvnw