A true-breeding plant with purple flowers is crossed with a true breeding plant with white flowers. Draw a Punnett
square to determine the possible outcomes of this cross. List the possible genotypes and phenotypes.

Answer and Explanation:

Punnett squares are diagrams that show the result of crosses of hybrid offspring through genetic breeding. Known parental genotypes and phenotypes are utilized, and they usually align with Mendelian ratios and inheritance. They follow the

For this cross...

     gametes: P w → flower color purple dominant (P), white recessive (w)

Assuming heterozygousity

                                                  purple × white

       phenotype:                     2 purple; 2 white

∴ all are genotypically heterozygous,  2 purple; 2 white

Assuming true breeding parents (homozygous)

                                      purple × white

       phenotype:               4 purple ; 0 white

∴ all are genotypically heterozygous, and purple

2. Parent generation or P generation:

gametes: W p → flower color white dominant (W), purple recessive (p)

Assuming true breeding parents (homozygous)

                                       white  × purple

phenotype:                    4 white; 0 purple

∴ all are genotypically heterozygous, and white

Assuming heterozygousity

                                            white ; purple

       phenotype:                     2 white;   2 purple

∴ all are genotypically heterozygous, 2 are white and 2 purple

Each punnet cross is attached in order below

a and b