In each of the following cases read the information provided and then, from the list below, choose the correct percentage chance of obtaining the indicated offspring in each case - Leaving Cert Biology - Question 2 - 2010

For the incomplete dominance in roses, a pink petal plant (Pp) being crossed with a white petal plant (pp) results in 50% white flowered offspring (pp). Thus, the chance of obtaining offspring with white petals is 50%.

For Dalmatian dogs, both parents being heterozygous for spots (Bb) leads to offspring ratios based on a Punnett square showing a 75% chance of black spots (BB or Bb) and a 25% chance of brown spots (bb). Therefore, the chance of obtaining offspring with black spots is 75%.

In this case, a red-haired woman (rr) and a black-haired man (who has a red-haired father, thus heterozygous Rr) can have offspring with a 50% chance of being red-haired (rr), as indicated by the Punnett square outcomes. Therefore, the chance of obtaining offspring with red hair is 50%.