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Genetics-Chapter 5 - 5A-1
Genetics - The Continuity of Life Part I - 5A-1
13
Biology
9th Grade
11/16/2010

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Term
Species Characteristic
Definition
Characteristics that every member of a species possesses.
Term
Individual Characteristic
Definition
Characteristics such as eye, hair and skin color, body build, intelligence, and other features that make a person unique.
Term
Genetics
Definition
The study of heredity.
Term
Gene
Definition
A section of DNA that produces a particular polypeptide chain of amino acids (a protein or a section of protein)that causes a particular trait.
Term
Chromosome
Definition
Strand of DNA complexed with proteins; usually found within the cell's nucleus.
Term
Histone
Definition
Proteins that support, protect, and help maintain the tightly coiled structure of the DNA in a chromosome.
Term
Chromatid
Definition
One of the two DNA duplicates that compose one chromosome (when the chromosome is not separated).
Term
Centromere
Definition
The attachment point of two sister chromatids; also serves as point of attachment of spindle fibers during mitosis.
Term
Karyotype
Definition
An illustration in which the chromosomes of a cell are arranged according to their size.
Term
Homologous Pair of Chromosomes
Definition
Two chromosomes that have the same kinds of genes (alleles) in the same order.
Term
Homologue
Definition
One member of a homologous pair of chromosomes.
Term
Diploid
Definition
The condition of having homologous pairs of chromosomes.
Term
Haploid
Definition
The condition of having only one member of each homologous pair of chromosomes; characteristic of gametes.
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