How much does your hair grow in one year?

a 2 inches

b 4 inches

c 6 inches

d 8 inches

Two true-breeding cucumber plant lines P1 and P2 produce cucumbers with lengths of 12 inches and 6 inches. When the two lines are crossed the F1 has an average length 9 inches and a variance of 2.0. The F2 has an average length of 10 inches and a variance of 3.0. What is the broad-sense heritability H^2?

The answer is 0.33

Please show work and give explainations. Thank you

In a population of plants, the average height of mature plantsis 12 inches. You pick seeds from the tallest ten plants, whichhave an average height of 14 inches. If theheritability of height in this species is 0.5,what will the average height of plants be that grow up from theseeds you picked?