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Vocabulary words for Genetics Vocabulary quiz.

hybrid

An organism that has two different alleles for a trait.

dominant

An allele whose trait always shows up in the organism when it is present.

gene

The set of information that controls a trait; code in the DNA.

alleles

The different forms of a gene.

heredity

The passing of traits from parents to offspring.

purebred

The offspring of many generations that have the same traits.

trait

A characteristic that an organism can pass to offspring through genes.

genetics

The scientific study of heredity.

probability

A number that describes how likely it is that an event will occur.

phenotype

An organism's physical appearance or visible traits.

recessive

An allele that is masked when a dominant allele is present.

codominance

A condition in which the two alleles of a gene are neither dominant nor recessive.

heterozygous

Having two different alleles for a trait.

genotype

An organism's genetic makeup or allele combinations.

Punnett Square

A chart that shows the possible combinations of alleles that result from a genetic cross.

homozygous

Having two identical alleles for a trait.

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