Why is it important to cooperate with other countries on environmental issues? a. environmental issues are not always localized. b. other countries have no environmental issues. c. other countries have more environmental issues. d. none of the above

Option A

Explanation:

Environmental issues can be a serious issue for any country or place on the earth as it is not restricted to a particular region.

Such kind of issues must be solved by all the countries as it is not limited to a particular region and any country can be affected by it at any point of time.

So, it should be solved together with the cooperation of other countries on earth.

we solve the problem using the hardy-wineberg equation.

let us start with the homozygous recessive proportion of individuals with sickle cell anaemia,

we have the proportion as q² = 0.25.

∴ q = 0.5 (frequency of hbs in population)

further,

solving for the frequency of normal cell by using the fact that,

p + q = 1

∴ p = 1 - 0.5 = 1 - 0.5 = 0.5

now we can calculate 2pq in p² + 2pq + q², which is the frequency for heterozygous carriers of sickle cell anaemia,

∴ 2pq = 2 x 0.5 x 0.5 = 0.5

and the homozygous normal cell individuals proportion is given by the expression,

∴ p² = 0.5² = 0.25

hence, the carriers for sickle cell anaemia are in proportion, 0.5, or 50%.