BIOS-1073 Lecture Notes - Lecture 1: Cytokinesis, Metaphase, Gene Expression
Document Summary
Uv radiation harmful to cells (melanin is the protector) (absorbs uv) The more genetically diverse a population, the better chance that population can survive changes. Main mechanisms for genetic variation is sexually reproducing individuals. Lost hair but increased melanin as humans evolved. Skin cancer hard to pass because it typically. Model for evolution of skin color diploid daughter cells. Negative selection for light skin color in equatorial. Homologous = one from mom and one from dad. Gene locus = exact location of a gene along the. In human populations that migrated to latitudes length of a chromosome with less uv positive selection for light skin. Allele = one copy of a particular gene. Allele inherited from parents could be different or the same production. Diploid number = total # of chromosomes in each. Heritable changes = lead to evolution by natural cell. (46 chromosomes. Except eggs and sperm. (2n) found in somatic.
