Aim: What factors affect the expression of the gene? The environment can play a significant role in the production of phenotypes Talk to your partner and make a list of environmental factors that may affect the expression of a gene (allele)

temperature caused the different phenotypes.

Temperature or water level affects the phenotype of these organisms Darker fur Leaves above water are broad, below the water-level are finely divided

Male Pattern Baldness is hereditary, you get it from your mother! The explanation is genetic and linked to your mother's X-Chromosome. Male-pattern baldness, which is usually inherited and also affects women, is caused by oversensitive hair follicles. Dihydrotestosterone (DHT), produced by the male hormone testosterone, causes the follicles to shrink and eventually stop functioning.

Twin Studies What is the genetic make up of identical twins? What have we found out about the expression of the gene when twins are separated? 'Identical Strangers' Explore Nature Vs. Nurture : NPR