Genetics Vocabulary

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The smallest pieces of chromosomes; determine what we look like

A genotype consisting of two identical alleles of a gene for a particular trait

The actual code that alleles or genes posses (eg. TT, Tt, or tt). The gene may or may not be expressed when you observe a living organism

a gene or heritable characteristic carried by a sex chromosome

Diagrams that are used to trace the inheritance of a specific trait, abnormality, or disease. Standard symbols are used to represent males, females, mating and offspring

Observed trait of an organism that masks the recessive allele of a trait

The study of heredity and the variation of inherited characteristics

In humans and other mammals a sex chromosome that is normally present only in male cells.