Studied by 214 peoplevariation
Any difference between individuals of the same species.
dominant allele
An allele whose trait always shows up in the organism when the allele is present.
recessive allele
An allele that is masked when a dominant allele is present
Codominance
A condition in which both alleles for a gene are fully expressed
DNA
A complex molecule containing the genetic information that makes up the chromosomes.
Phenotype
An organism's physical appearance, or visible traits
Genotype
An organism's genetic makeup, or allele combinations.
acquired trait
A trait that is not in your genes but is picked up from environmental factors.
inherited trait
A characteristic that is passed from parent to offspring.
Chromosomes
threadlike structures made of DNA molecules that contain the genes
Traits
Characteristics that are inherited
Pedigree
A diagram that shows the occurrence of a genetic trait in several generations of a family.
Alleles
Different forms of a gene
Gene
A segment of DNA on a chromosome that codes for a specific trait
Punnett Square
A chart that shows all the possible combinations of alleles that can result from a genetic cross
double helix
Shape of DNA
Homozygous
An organism that has two identical alleles for a trait
Heterozygous
An organism that has two different alleles for a trait
offspring
Product of reproduction, a new organism produced by one or more parents
sex-linked traits
Traits controlled by genes located on sex chromosomes.
Autosomal
all the other genes in the body that are not sex-linked.
Carrier
A person who has one recessive allele for a trait, but does not have the trait.
Heredity
Passing of traits from parents to offspring
Probability
A percentage that describes how likely it is that an event will occur
Note
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