ou are studying variation in the leg length of lizards, in wet and dry areas. You find that leg length varies continuously. You carefully measure the leg length of the parents to form a mid-parent average, and the leg length of their offspring. You plot linear regressions from your data and obtain this graph. A) (2 points) Your colleague says that your results must be wrong as heritability reflects genetics and so is a fixed quantity. Briefly explain to your colleague why they are wrong and explain two distinct reasons why heritabilities can vary across samples and environments