Question

because the percent of offspring in the f1 generation with the following formula percent of offspring = (number with the trait / total number of offspring) x 100
purple flowers?
judging from the results above, what percent of the offspring should have only purple flowers?
enter numerical

Explanation:

Step1: Analyze F1 and F2 generations (assuming Mendelian genetics, F1 all purple, F2 ratio 3:1 purple to white)

In a typical monohybrid cross (e.g., purple (dominant) vs white (recessive) flowers), if F₁ generation has all purple flowers (heterozygous, say Pp), then F₂ generation is produced by self - pollination of F₁. The Punnett square for Pp × Pp gives genotypes PP, Pp, Pp, pp. The phenotypes: PP and Pp are purple, pp is white. So the ratio of purple to white in F₂ is 3:1.

Step2: Calculate percentage of purple flowers in F₂

The total number of offspring genotypes in F₂ is 4 (from Punnett square: 1 PP, 2 Pp, 1 pp). The number of offspring with purple flowers is 3 (PP + Pp + Pp). Using the formula: Percent of offspring = $\frac{\text{number with the trait}}{\text{total number of offspring}}×100$. So $\frac{3}{4}×100 = 75\%$.

Answer:

75%