BIOL 113 Chapter Notes - Chapter 13: Homologous Chromosome, Asexual Reproduction, Y Chromosome
8 Jan 2018
School
Department
Course
Professor
Document Summary
Thursday, november (cid:1007)(cid:1004), (cid:1006)(cid:1004)(cid:1005)7 (cid:1006):(cid:1008)(cid:1009) pm: variations on a theme. Inheritance/heredity: transmission of traits from one generation to the next. Not identical copies of either parent: genetics: study of heredity & inherited variation, meiosis & fertilization: maintain species chromosome count during sexual life cycle, offspring acquire genes from parents by inheriting chromosomes. Inheritance of genes: genes: heredity units of coded information. Genetic link to parents: genetics: written in dna - polymer of 4 nucleotides. Info passed by specific sequence of nucleotides: most genes program cells to synthesize specific enzymes & other proteins. Cumulative action produces inherited traits: transmission of traits thru dna replication. Passed to offspring: gametes: reproductive cells - transmit genes from on generation to next. Fertilization: male and female gametes unite - passing both parent genes to offspring: dna location eukaryotes: Mostly in nucleus: humans have 46 chromosomes in somatic cells. Single indivi passes copies of all genes to offspring w/out fusion of gametes.
