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Genetics
Vocabulary
20
Biology
9th Grade
01/27/2009

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Term
genetic diversity
Definition
variety of traits or genes that can be




variety if traits or genes that can be inherited in a breedign population.
Term
genetic mutation
Definition
changes in the nucleotide sequence which are usually copying errors during DNA replication.
Term
genetic variation
Definition
variation in genes of species due to genetic mutation, crossing over, independent assortment.
Term
genes
Definition
segment of DNA on chromosomes that represent inherited traits that are passed on from one generation to another generation.
Term
DNA
Definition
(deoxyribonucleic acid), a double-stranded "ladder" that twists together to form a helix. It contains genetic information for cell growth, division, and function. Composed of alternating phosphate, sugar, and nitrogenous base (CGTA)
Term
double helix
Definition
twisted ladder shape of DNA, formed by two nucleotide strands twisted around each other.
Term
nucleotides (DNA subunits)
Definition
a subunit of nucleic acid formed from a sugar, phosphate, and nitrogenous base.
Term
chromosomes
Definition
DNA containing structure that carries genetic material from one generation to another.
Term
enzyme (DNA polymerase)
Definition
enzyme that helps make new DNA molecules
Term
RNA
Definition
(ribonucleic acid), single strand of nucleotides that guides protein synthesis.
Term
messenger RNA
Definition
type of RNA that carries genetic information from DNA in the nucleus to direct protein synthesis in the cytoplasm
Term
complementary sequence
Definition
nucleic acid base sequence that can form a double-stranded structure by matching base pairs. EX G-T-A-C is C-A-T-G
Term
protein synthesis
Definition
the making of proteins by cells that use DNA, RNA and enzymes
Term
proteins
Definition
organic compound made of amino acids joined by peptide bonds, building blocks of organisms
Term
amino acids
Definition
building blocks of proteins
Term
amino acid sequence
Definition
a sequence of amino acides put together to make a protein.
Term
transcription
Definition
process in which mRNA is synthesized/formed from the DNA template.
Term
transfer RNA
Definition
type of RNA that transfers amino acids to the ribosome.
Term
translation
Definition
process in which mRNA attaches to the ribosome and a protein is assembled.
Term
codon
Definition
3 base codes together in DNA or RNA strand.
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