Biology 1201A Chapter Notes - Chapter 9: Homologous Chromosome, Zygote, Interphase
5 Jan 2016
School
Department
Course
Professor
Document Summary
Genetic recombination: process by which the combinations of alleles for different genes in two parental individuals become shuffled into new combinations in offspring individuals . Allows jumping genes to move, insert some viruses into chromosome of host, underlies the spread of antibiotic resistance among bacteria and is at the heart of meiosis. Homology allows different dna molecules to line up and recombine. Cutting and pasting 4 dna backbones results in 1 recombination event precisely. offspring. Sexual reproduction: union of male and female gametes to produce. Meiosis is process that recombines dna sequences and produces cells with half the number of cells as somatic cells. Fertilization: the nuclei of 2 gamete fusing to produce a diploid zygote. Meiosis and fertilization create genetic variability by mixing genetic (fertilized egg) information. 9. 3a meiosis occurs in different places in different organismal life cycles. Diploid phase is dominant, haploid phase is reduced, and meiosis is followed directly by gamete formation.
