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PBS Unit 4.2

Vocabulary

QuestionAnswer
Autosome A chromosome that is not directly involved in determining sex, as opposed to a sex chromosome.
Chromosome Any of the usually linear bodies in the cell nucleus that contain the genetic material.
Contagious Capable of being transmitted from person to person, animal to animal, animal to human, or human to animal by contact.
Dominant trait 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.
Gene A discrete unit of hereditary information.
Genetic Material Molecules responsible for heredity and variation of organisms.
Heredity The transmission of traits from ancestor to descendant.
Karyotype A display of the chromosome pairs of a cell arranged by size and shape.
Mutation A rare change in the genetic material, ultimately creating genetic diversity.
Pedigree A diagram of a family tree showing the occurrence of heritable characters in parents and offspring over multiple generations.
Sex Chromosome One of the pair of chromosomes responsible for determining the sex of an individual.
Recessive trait A condition that appears only in individuals who have received two copies of a mutant gene, one copy from each parent.
Created by: connie king
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