DNA, genes and chromosomes
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10 Terms
What is a gene?
A short section of DNA that codes for an amino acid sequence of a polypeptide and functional RNA
Define locus
A fixed position of a particular gene on a chromosome
Define allele
A different version of the same gene
What is a chromosome?
A structure consisting of a long coiled molecule of DNA and its associated proteins
How many chromosome pairs in humans?
23
What is a homologous chromosome pair?
A pair of chromosomes that are the same size, have the same genes in the same loci, but may have different alleles of those genes
What is DNA
Deoxyribonucleic acid
Important information carrying molecule that holds the genetic code for all living organisms
Describe Eukaryotic DNA
Long
Linear
Associated with histone proteins
Describe Prokaryotic DNA
Short
Circular
Not associated with histone proteins
What elements does DNA contain?
Carbon
Hydrogen
Oxygen
Nitrogen
Phosphorous
Note 
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