Overall subject Flashcards
DNA
Deoxyribonucleic acid, genetic material of organisms.
Nucleus
Cell structure where DNA is located.
Double Helix
Shape of DNA, resembling a twisted ladder.
Nucleotides
Building blocks of DNA composed of sugar, phosphate, base.
Deoxyribose Sugar
Sugar component of DNA nucleotides.
Nitrogen Bases
Adenine, Thymine, Guanine, Cytosine in DNA.
Complementary Base Pairing
A pairs with T, G pairs with C.
Chromosomes
Structures containing DNA, organized in cells.
Autosomes
Chromosomes 1-22, determine body structure and function.
Sex Chromosomes
Chromosome pair 23, determines biological sex.
Homologous Chromosomes
Chromosomes of the same length, paired at centromere.
Diploid
Cell with two complete sets of chromosomes.
Haploid
Cell with a single set of chromosomes.
Allele
Different versions of a gene at a locus.
Genes
Segments of DNA that determine traits.
Genetic Code
Rules for translating DNA into proteins.
Codons
Three-nucleotide sequences that specify amino acids.
Polymer
Large molecule made of repeating smaller units.
DNA Replication
Process of copying DNA before cell division.
Sister Chromatids
Identical copies of a chromosome after replication.
Mitosis
Cell division producing identical daughter cells.
Phases of Mitosis
Prophase, Metaphase, Anaphase, Telophase (PMAT).
Meiosis
Cell division producing genetically diverse gametes.
Crossing Over
Exchange of DNA segments between homologous chromosomes.