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Mutations, Gene Regulation, and Meiosis
Genetics
10
Biology
9th Grade
11/25/2012

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Term
Somatic cell
Definition
Any cell of a living organism other than the reproductive cells. These undergo mitosis.
Term
Gamete
Definition
A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote. These undergo meiosis.
Term
Diploid
Definition
Containing two complete sets of chromosomes, one from each parent.
Term
Haploid
Definition
Having a single set of unpaired chromosomes.
Term
Dominant
Definition
A genetic trait in which one copy of the gene is sufficient to yield an outward display of the trait; dominant genes mask the presence of recessive genes; dominant traits can be inherited from a single parent.
Term
Recessive
Definition
An inherited trait that is outwardly obvious only when two copies of the gene for that trait are present—as opposed to a dominant trait where one copy of the gene for the dominant trait is sufficient to display the trait.
Term
Genotype
Definition
The genetic constitution of an individual organism.
Term
Phenotype
Definition
The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Term
Meiosis
Definition
A type of cell division that results in two daughter cells each with half the chromosome number of the parent cell.
Term
Homologous
Definition
Having the same relation, relative position, or structure, in particular.
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