Genetics

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Allele

Different forms of genes for a single trait

Pedigree

Family tree

Dominant

Gene that is always expressed

Recessive

Gene that is masked or another words only expressed in the homozygous state

Heterozygous

Genotypes made of two different alleles

Homozygous

Genotypes made up of the same alleles

Codominance

Occurs when both alleles in a heterozygous gene expresses himself fully causing the heterozygous phenotype the show both the dominant and recessive form

Incomplete dominance

Occurs when neither allele in a heterozygous gene expresses itself fully

Gene

Segment of DNA on a chromosome that controls a particular hereditary trait

Genotype

The allele combination for particular trait

Genetics

The field of biology devoted to understanding how characteristics are transmitted from parents to offspring

Phenotype

The outward expression or physical appearance of the gene

Heredity

The transmission of characteristics from parents to offspring

Sex linked trait

Traits found on the X or Y chromosomes

Multiple alleles

When two or more alleles for a trait in the population


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