SBI3U – Genetic Processes
106747616
Probability
Probability involves ___________________ how often we should expect a particular
event to ____________________
Unless there is some outside influence, events usually occur by ________________
If you roll a normal 6 sided die, the probability of rolling a ‘3’ is one chance in six
Each time you roll a die the probability remains the same
When calculating the probability that two (or more) events will occur, the
___________________ probabilities for each event are _____________________
Example: the probability of rolling two consecutive 3’s
The probability of rolling two hundred consecutive three’s is so remote that if it
actually occurred you would suspect ___________________ die
Biologists use the concept of probability to predict genetic _____________________
We have also developed tables and formulae to assist us in making decisions
whether results are obtained by _______________, or a ___________________
Group Data
Heads
Tails
Heads
Tails
Expected Number
Expected Ratio
Actual Number
Actual Ratio
Class Data
Expected Number
Expected Ratio
Actual Number
Actual Ratio
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SBI3U – Genetic Processes
106747616
Examples:
A coin is tossed in the air and allowed to land randomly on the table. What is the
probability it will come up heads?
Calculate the probability of throwing three of sixes when three dice are rolled.
What are the chances that a family of four children will have all girls?
What is the probability of drawing a face card from a standard deck of cards?
What is the probability of rolling a Yahtzee? (Five dice of the same value)
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