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Investigation 9 Genetics
Vocabulary
10
Science
8th Grade
10/14/2007

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Term
P generation
Definition
Parents
Term
Filial
Definition
Sons and daughters
Term
Feature
Definition
A structure, characteristic, or behavior of an organism, such as eye color, fur pattern, or timing of migration.
Term
Trait
Definition
The specific way a feature is expressed in an individual organism
Term
Homozygous gene
Definition
A gene composed of two identical alleles (e.g., both dominant).
Term
Heterozygous gene
Definition
A gene composed of two different alleles (a dominant and a recessive).
Term
Allele
Definition
Variations of genes that determine traits in organisms; the two corresponding alleles on two paired chromosomes constitute a gene.
Term
Phenotype
Definition
The traits produced by the genotype; the expression of the genes.
Term
Genotype
Definition
An organisms' particular combination of paired alleles.
Term
Gene
Definition
The basic unit of heredity carried by the chromosomes; code for features of organisms.
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