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Definitions
Probability %
Draw the Punnett Square
What are the Parents??
Random
100

An observable, physical characteristic

Phenotype

100

Both parents are heterozygous for brown hair. What is the probability that their offspring will have blonde hair.

25 %

100

Dad is homozygous dominant

Mom is homozygous recessive


                 B                  B

         b           Bb        Bb          


          b          Bb        Bb

100

Offspring have a 100% probability of being recessive for blue eyes

Both parents are homozygous recessive: bb

100

Each square in the Punnett Square equals how much percent

25 %

200

Specifies what form the gene will take

Allele
200

Both parents are homozygous recessive for blonde hair. What is the probability that their offspring will have brown hair

0 %

200

Use the letters F or f

Dad is homozygous dominant for freckles

Mom is heterozygous for freckles

              F               F

     F        FF         FF


       f      Ff          Ff

200

There is only 25% probability that the offspring will have blue eyes.

Both parents are heterozygous: Bb

200

If Ms. Boyd won the lotto what would she build

A home library

300

What is the difference between dominant and recessive

Dominant will show over recessive

300

Black eyes in monsters are dominant over Blue eyes. Both parents are heterozygous, what is the probability their offspring will have Black eyes

75%
300

Blacks eyes (B)

Red eyes (b)

Make a cross between two heterozygous rats

          B            b

   B       BB        Bb


    b      Bb         bb

300

There is only 25% probability that the offspring will be homozygous dominant

Both parents are heterozygous: Bb

300

What did Ms. Boyd do over Thanksgiving break

Read a book!

400

What are the 3 combinations of alleles that make up genotypes

BB

Bb

bb

400

Both parents are heterozygous for big ears What is the probability that their offspring will carry the gene for small ears

75%

400

Red chest (R)

White chest (r)

Make a cross between a pure recessive and a heterozygous

          R               r

r          Rr          rr


r          Rr          rr

400

100% of the offspring are pure dominant for brown eyes.

Both parents are homozygous dominant: BB

400

Ms. Boyd's favorite type of cookie

Chocolate Chip

500

Contains genetic information of an organism

DNA

500
What does the entire Punnett Square represent


The probability of offspring phenotype and genotype

500

Use H or h

Dad is pure homozygous dominant

Mom is pure homozygous recessive

          H            H


h          Hh    Hh

h          Hh    Hh

500

Free 500 Points!!

You're Welcome

500

Ms. Boyd's favorite bar of candy

Twix