Population genetics! =)

1. A.

2. \({sqrt{\49}}\) = 7, so C.

1. A
2. A The Hardy-Weinberg Principle basically says thay allele frequencies won't change from generation to generation. There are two equations related to Hardy-Weinberg. Let p be one allele and q be the other allele. The equations are p + q = 1 and p^2 + 2pq + q^2 = 1. In this case you know that your initial q^2 =0.49. As star correctly calculated, that means that q=0.7. But she forgot that in order to get the percentage of white coats in the next generation you have to square 0.7, and 0.7^2=0.49, or 49%. Again, the other way of thinking about this is that since the population obeys the Hardy-Weinberg assumptions, the frequencies will not change so the answer has to be 49%.

1.A
2. 49% as it obeys haryweinberg's law.