My AP Biology Thoughts  Unit 5 HeredityWelcome to My AP Biology Thoughts podcast, my name is Nikki Evich and I am your host for episode #103 called Unit 5 Heredity Environmental Effect on Phenotype. Today we will be discussing how the environment can alter phenotypes.Segment 1: Introduction to Environmental Effect on PhenotypePhenotype is determined by genotype Genotype and environment work together to determine phenotypetemperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotypeThese can turn on and off genesSegment 2: More About Environmental Effect on Phenotype Fur colorThese rabbits and cats have a mutant allele for the coat color gene that is whiteThe enzyme encoded by the gene is inactive at temperatures above about 35 degreesThe extremities are cooler than the main body (around 25 degrees), so the fur on these regions is dark.Segment 3: Connection to the Course Environmental pressures drive diversity in ecosystemsPhenotypic diversity is caused by not only genetics, but the environment as wellA higher diversity in ecosystems allows populations to be better suited for sudden changes to their ecosystemThank you for listening to this episode of My AP Biology Thoughts. For more student-ran podcasts and digital content, make sure that you visit www.hvspn.com. Bye now!Music Credits:"Ice Flow" Kevin MacLeod (incompetech.com)Licensed under Creative Commons: By Attribution 4.0 Licensehttp://creativecommons.org/licenses/by/4.0/Subscribe to our PodcastApple PodcastsSpotifyGoogle Podcasts   YouTube  Connect with us on Social Media