(1) What will be the frequency of the recessive allele in a population of 100 kangaroos if there are 50 dominant alleles? a.150

b.0.75

c.0.50

d.0.25

(2) If the frequency of the recessive allele for a gene is 0.3, calculate the expected frequency of heterozygotes in the next generation if the population is in Hardy-Weinberg equilibrium.

a.0.42

b.0.21

c.0.70

d.0.30

1. Option c

2. Option a

Explanation:

1. If there are 50 dominant alleles, this represent the frequency of dominant alleles p = 50/100 = 0.5

Using the formula p+q = 1 we can solve for the frequency of the recessive alleles q = 1 -0.5 = 0.5 = 50%.

2. the frequency of the recessive allele for a gene is 0.3 which is q = 0.3

From the Formula p + q = 1 we can solve for p the frequency of the dominant alleles = 1 - 0.3 = 0.7

To calculate for the number of heterozygotes, we use 2pq = 2 x 0.7 x 0.3 = 0.42

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation: