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100
A genetic difference among members of the same species that may enable individuals to better survive and reproduce.
Variation
100
The passing of inherited traits from parent to offspring.
Heredity
100
The portion of a chromosome that controls a particular inherited trait.
Gene
100
A change in an organism's DNA
Mutation
100
A living organism that receives all of its DNA from one parent and is genetically identical to that parent.
Clone
200
One of the threadlike structures in the nucleus of a cell that stores detailed directions for the cell's activities.
Chromosome
200
The study of heredity
Genetics
200
The survival and successful reproduction of the organisms that are best suited for their environment.
Natural Selection
200
A chromosome normally only present in males.
Y Chromosome
200
a chromosome that is usually present in pairs for females, and alone in males.
X Chromosome
300
A medicine that kills disease-causing bacteria without harming the host.
Antibiotic
300
All of the DNA that makes up an organism.
Genome
300
Adding genes from one organism to the genes of another organism.
Gene Splicing
300
A chart that traces the history of traits in a particular family.
Pedigree
300
An organism that has inherited the gene for a specific trait but does not express that trait.
Carrier
400
A condition caused by mutation, or change, in a gene or set of genes.
Genetic Disorder
400
A way of intentionally changing the DNA sequence of a gene so that the gene will produce a particular trait.
Genetic Engineering
400
An organism produced by the crossing of parents that have two different forms of the same trait.
Hybrid
400
The way in which a genotype is expressed, or shown, in an organism.
Phenotype
400
The genes that are inherited by an organism for a particular trait.
Genotype
500
A characteristic that is passed from parent to offspring.
Inherited Trait
500
The form of an inherited trait that masks the other form of the same trait.
Dominant Trait
500
A trait influenced by experience or the environment.
Acquired Trait
500
The hidden form of an inherited trait which will only show in the phenotype if it is paired with another recessive gene.
Recessive Trait
500
A scientist who studies how heredity works.
Geneticist
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