Question

when mendel crossed a true breeding purple flower plant with a true breeding white flower plants, what percent of the offspring were purple? 50 0 75 100 25

Explanation:

Step1: Recall Mendel's experiment

Mendel's experiments with pea plants: True - breeding purple (let's assume genotype \(PP\)) and true - breeding white (genotype \(pp\)) are crossed. The cross is \(PP\times pp\).

Step2: Determine the offspring genotype

Using the Punnett square, all offspring will have the genotype \(Pp\). Since purple is dominant (Mendel's findings for pea flower color, where purple is dominant over white), all \(Pp\) individuals will show the purple phenotype.

Step3: Calculate the percentage

If all offspring show the purple phenotype, the percentage of purple - flowered offspring is \(\frac{\text{Number of purple offspring}}{\text{Total number of offspring}}\times100=\frac{\text{All offspring}}{\text{All offspring}}\times100 = 100\%\).

Answer:

100 (the option with value 100)