A previous researcher conducted a survey of a poplation reco

A previous researcher conducted a survey of a poplation recording the phenotypes of individuals. Her notes indicate that 51% of the population have petals with a basal spot. However, her notes do not indicate how many of those also have a central spot. If you assume that the population is in Hardy-Weinberg equilibrium, what proportion of the toal population has both a basal and a central spot?

*** The correct answer is 0.42 but I am looking for an explanation how to get to this answer please. Thank you!

Solution

51% or 0.51 have basal spot then 49% or 0.49 have central spot p2 + 2pq + q2 =1 (0.51)2 + 2(0.51)(0.49) + (0.49)2 =1 0.2601 +0.4998 + 0.2401 = 1 49.9% population is heterozygous with the phenotypes basal and central spots.