Short notes on the Punnett Square

Punnett Square

Example: 

Eye Colour

Let's say...

B=brown eyed      -     This is the DOMINANT allele.

b=blue eyes          -     This is the RECESSIVE allele

 If we say that the mother's genotype is BB ( meaning her phenotype is brown eyes) and the father's genotype is Bb ( meaning his phenotype is also brown eyes. To calculate the likelihood of the offspring/child having blue/ brown eyes we can use a Punnett Square to show the possibilities.

                         B              B

B                     BB            BB            …