Web Results



A portion of a DNA molecule that specifies a single functional unit is called a gene; ... containing a unique combination of DNA sequences that code for genes. ... If a mutation occurs within a gene...

Genetics 101 — The Hereditary Material of Life | NIH MedlinePlus ...


A gene is a short piece of DNA—deoxyribonucleic acid, the hereditary material in ... An abnormal genetic trait passed down through families (inherited) may: ... Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small ... The information in DNA is stored as a code made up of four chemical bases: ...

Glossary of Behavioral Genetics Terms


A gene or locus that has more than one common allele is called a polymorphism. ... DNA (deoxyribonucleic acid) The molecule that contains the genetic code for all .... One of MendelÌs original laws stating that the hereditary factor for one trait ...

Basic Principles of Genetics: Glossary of Terms


Dominant alleles for a trait are usually expressed if an individual is ... a large organic molecule that stores the genetic code for the synthesis of ... an X-linked genetically inherited recessive disease in which one or more of the ..... In other words, the hereditary material of any organism is made up of discrete units (now called ...

Each Organism's Traits Are Inherited from a Parent through ... - Nature


Today, most scientists agree that genes correspond to one or more DNA sequences ... which he called traits, were passed down to successive generations. ... This combination of parental elementen then determined which form of a trait was .... chromosomes are indeed the physical carriers of hereditary information, and this ...

Glossary :: DNA from the Beginning


The flower color gene in this case has two alleles, one for white and the other for .... dominant: A genetic trait or disorder is dominant when only one copy of the gene is .... mutation: A change in the genetic code (the A's, C's, G's and T's) of a gene. .... This happens at the protein-making factories of the cell call...

Genetic Code Facts, information, pictures | Encyclopedia.com ...


Get information, facts, and pictures about Genetic Code at Encyclopedia.com. ... Any single set of three nucleotides is called a codon , and the set of all possible ... Each of the remaining sixty-one codons encodes an amino acid. .... soon after the discovery that the DNA comprised the hereditary material of living organisms.

How is genetic information stored? - NCHPEG


Genetic information is stored within the chemical structure of the molecule DNA. ... the letters A, T, C and G, and their order literally "spells" out the genetic "code". The variable sequence of bases from individual to individual is one source of biological variation. ... Allele: Different versions of the same gene...

heredity | genetics | Britannica.com


Jul 17, 2015 ... Because genes are integral to the explanation of hereditary ... Genetic research also has demonstrated that virtually all organisms on this planet ... Heredity was for a long time one of the most puzzling and .... Weismann concluded that the hereditary endowment of the organism, which he called the germ ...

Dna - What's a Genome?


DNA is the molecule that is the hereditary material in all living cells. ... A gene consists of enough DNA to code for one protein, and a genome is simply the ... a sugar molecule, a phosphate molecule, and a structure called a nitrogenous base.

Helpful Resources

What is a DNA code for one hereditary trait called - Answers


The DNA code for one hereditary trait is called a gene.

What Are the Small Parts of DNA That Code for a Trait? | Education ...


Deoxyribonucleic acid, or DNA, is a long molecule with a backbone consisting of ... The small regions that code for proteins are called genes, and proteins are ... enzyme complex to an appropriate spot on one of the organism's chromosomes.

Glossary of Terms


Base - One of the four different chemical units which comprise DNA. The sequence of DNA bases codes for the amino acid sequence of proteins. ... substance within the chromosomes that carries the hereditary instructions for producing ... Genotype - The underlying genetic makeup of a trait or the overall genetic makeup of ...

DNA - Regents Exam Prep Center


These instructions are called genes and contain the instructions for life that are ... The DNA molecule which makes up our genes contains this code. ... Hereditary information is contained in genes, which are composed of DNA, located in the ... An inherited trait of an individual can be determined by one genes, but is usually  ...

DNA, Genes, Chromosomes - GeneEd - National Institutes of Health


Genes are organized and packaged in units called “chromosomes. ... One set of chromosomes for each pair comes from a person's mother, and the other ... Description: The DNA code contains instructions needed to make the proteins ... software that teaches concepts of heredity, meiosis and the pathway from DNA to trait.