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Fundamentals of DNA, Chromosomes, and Cells Study Guide

This guide covers the essential concepts of molecular biology, including DNA structure and function, the processes of DNA replication and RNA transcription, and the dynamics of chromosomes during the cell cycle. It details the mechanisms of mitosis and meiosis, emphasizing their roles in cell division and genetic diversity.

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Fundamentals of Genetics and Genome Organization

Principles of Genetic Variation and DNA Repair

This content explores sources of genetic variation including DNA replication errors, chromosome segregation, recombination errors, and single nucleotide transitions or transversions.

  • DNA replication errors
  • DNA polymerase proofreading activity
  • Nondisjunction events
  • Recombination errors
  • Deamination of cytosine
  • Mismatch repair
  • Nucleotide excision repair
  • Single-strand break repair
  • Interstrand cross-link repair
  • Double-strand break repair
  • Homologous recombination
  • Base excision repair
  • Telomere maintenance
  • Transition and transversion mutations
  • Microsatellite DNA
  • Minisatellite DNA
  • Satellite DNA
  • Strand slippage
  • Structural variation
  • Low copy number variation

Principles of Functional Genetic Variation

Mechanisms of genetic variation and positive selection result in adaptive evolution and extraordinary variation in the immune system.

  • Functional genetic variation
  • Protein polymorphism
  • Gene duplication
  • Allelic variation
  • Alternative splicing
  • Positive selection
  • Adaptive evolution
  • Selective sweep
  • Hypoxia response
  • Somatic recombination
  • Hypermutation
  • Immunoglobulins
  • T cell receptors

Fundamentals of DNA, Chromosomes and Cells

This content covers the structure of nucleic acids, DNA replication, RNA transcription, and the organization of chromatin and chromosomes during the cell cycle.

  • 5' to 3' polarity
  • Antiparallel nature of DNA
  • Phosphodiester bonds
  • Complementary base pairing
  • Semi-discontinuous DNA replication
  • Okazaki fragments
  • DNA polymerases
  • Telomerase
  • RNA transcription
  • Interphase chromatin organization
  • Centromere and kinetochore function
  • Telomere structure and T-loop formation
  • Mitochondrial DNA replication
  • Mitosis and cytokinesis
  • Meiosis and gamete production

Independent Assortment and Recombination in Meiosis

Independent assortment of maternal and paternal homologs during meiosis and recombination superimposes additional genetic variation.

  • Independent assortment
  • Maternal and paternal homologs
  • Meiosis
  • Diploid primary spermatocytes
  • Haploid sperm cells
  • Recombination
  • Genetic variation

Fundamentals of Gene Structure and Expression

This content covers human genome organization, protein-coding genes, RNA splicing, translation, and levels of protein structure.

  • human genome organization
  • protein coding genes
  • alternative splicing
  • RNA splicing
  • translation
  • transfer RNA structure
  • translational reading frame
  • protein chemical modification
  • primary protein structure
  • secondary protein structure
  • tertiary protein structure
  • quaternary protein structure
  • noncoding RNA

Human Genome Organization and Repetitive Sequences

This topic explores human genome organization, including noncoding RNA versatility, mitochondrial genome structure, gene families, and various classes of repetitive DNA and transposons.

  • noncoding RNA
  • human genome organization
  • evolutionary conservation
  • repetitive sequences
  • mitochondrial genome
  • tandemly repetitive coding DNA
  • clustered gene families
  • tandem gene duplication
  • pseudogenes
  • retrogenes
  • retropseudogenes
  • retrotransposons
  • LINEs
  • SINEs
  • human endogenous retrovirus
  • DNA transposon repeats

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