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Lesson 3.3 Key Terms
Terms in this set (17)
Any of the alternative forms of a gene that may occur at a given locus or position.
A chromosome that is not directly involved in determining sex, as opposed to a sex chromosome.
Any of the linear bodies in the cell nucleus that contain the genetic material.
A genetic trait is considered dominant if it is expressed in a person who has only one copy of the gene associated with the trait.
A discrete unit of hereditary information.
Molecules responsible for heredity and variation of organisms.
All or part of the genetic constitution of an individual or group.
The transmission of traits from ancestor to descendant.
Chromosomes having the same genes or alleles usually arranged in the same order.
A display of the chromosome pairs of a cell arranged by size and shape.
The cellular process that results in the number of chromosomes in gamete-producing cells being reduced to one half. One of each pair of homologous chromosomes passes to each daughter cell.
A process that takes place in the nucleus of a dividing cell, involves a series of steps, and results in the formation of two new nuclei each having the same number of chromosomes as the parent nucleus.
A rare change in the genetic material, ultimately creating genetic diversity.
A diagram of a family tree showing the occurrence of heritable characteristics in parents and offspring over multiple generations.
The observable properties of an organism that are produced by the interaction of the genotype and the environment.
A condition that appears only in individuals who have received two copies of a mutant gene, one copy from each parent.
One of the pair of chromosomes responsible for determining the sex of an individual.
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