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en.wikipedia.org/wiki/Introduction_to_genetics

A long molecule that looks like a twisted ladder. It is made of four types of simple units and the ... Traits determined by genes can be modified by the animal's surroundings ... Chromosomes all contain DNA made up of four nucleotides, abbreviated C ... The genetic code not only controls inheritance: it also controls gene ...

en.wikipedia.org/wiki/Gene

A gene is a locus (or region) of DNA which is made up of nucleotides and is the molecular unit ... Some genetic traits are instantly visible, such as eye color or number of limbs, and .... The genetic code is nearly the same for all known organisms. .... their functional products (proteins or RNA) rather than their specific DNA loci, ...

www.answers.com/Q/A_portion_of_DNAwhich_codes_a_specific_hereditary_trait

This is a definition of a gene.. Genes are regions of a DNA molecule. An individual DNA molecule can carry thousands of genes.. Hereditary traits are features ...

quizlet.com/25549586/genetics-flash-cards

a specific characteristic that varies from one individual to another ... gene. sequence of DNA that codes for a protein and thus determines a trait ..... chromosomes exchange portions of their chromatids during meiosis (also called gene shuffling).

education.seattlepi.com/small-parts-dna-code-trait-4457.html

Deoxyribonucleic acid, or DNA, is a long molecule with a backbone consisting of alternating sugar and phosphate groups. A nucleotide base -- a ringed ...

www.cccoe.net/genetics/glossary.html

The sequence of DNA bases codes for the amino acid sequence of proteins. ... alleles (or genes) for a specific trait are equally strong: a mixture of the two phenotypes ... Each gene is a segment of DNA that carries instructions for producing the ...

anthro.palomar.edu/biobasis/glossary.htm

proteins that provide the specific signature or identity to blood or other tissue cells . .... DNA base pairs that code for proteins and, therefore, are part of genes. ... the study of gene structure and action and the patterns of inheritance of traits from ...

www.merckmanuals.com/home/fundamentals/genetics/genes-and-chromosomes

A gene is a segment of DNA containing the code used to synthesize a protein. ... Some traits are caused by abnormal genes that are inherited or that are the ... Particular sequences of three bases in DNA code for specific instructions, ... When transcription is initiated, part of the DNA double helix splits open and unwinds.

www.scientificamerican.com/article/how-are-traits-passed-on

DNA consists of four different sugars that interact with each other in specific ways. ... helped us to understand this "Central Dogma" of heredity--that the DNA code ... skin color and so on--there is a gene or group of genes that controls the trait by ... Scientific American is part of Springer Nature, which owns or has commercial ...