Two highly inbred strains of mice are crossed. the f1 generation has a mean tail length of 4.3 cm and a standard deviation of 1.3 cm. the f2 generation has a mean tail length of 4.3 cm and a standard deviation of 3.5 cm. calculate the v(e), v(g), and broad-sense heritability for tail length in this population.

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?