Heredity,Punnett Squares, & Probability Power Point Presentation

Heredity, Genetics Punnett Squares & Probability Mr. Miller

Lets find out if the two pigeons on the left produce offspring that have the traits of the pigeon on the right

To do this we must understand how to use a Punnet Square ,[object Object],[object Object]

Lets see how to use it ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Now lets set up the Punnet Square T t t t T T t t t t t t

What are the number of genotypes for the traits the offspring can inherit? T t t t ,[object Object],[object Object],Tt tt Tt tt

Now lets talk about probability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lets find the probability the child will be tall ,[object Object],2 What are number of possible genotypes? 4 T t t t Tt tt Tt tt

Now lets find the probability! ,[object Object],[object Object],[object Object],[object Object]

Now try this one ,[object Object],[object Object],[object Object],[object Object],[object Object],Z Z z z z z z Z Z Z z Z

Now lets look at the possible genotypes and the phenotypes that will be expressed Z Z z z z z z Z Z Z z Z There is a single possibility of inheriting a homozygous (pure) dominant genotype which will produce a phenotype with grey feathers There are two possibilities of inheriting heterozygous (hybrid) genotypes which will produce a phenotype with grey feathers

Now lets look at the possible genotypes and the phenotypes that will be expressed Z Z z z z z z Z Z Z z Z There is a single possibility of inheriting a homozygous (pure) recessive genotype which will produce a phenotype with white feathers So two grey birds can produce a pigeon with white feathers!

Now lets find the probability ,[object Object],= Z Z z z ZZ Zz Zz zz

Heredity,Punnett Squares, & Probability Power Point Presentation

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Heredity,Punnett Squares, & Probability Power Point Presentation