Genetics Vocabulary

Different forms of the same gene (for example, blue eyes or brown eyes); one member of a pair or series of genes on specific chromosomes in specific positions

• allele

• heredity

• dominant

• recessive

Tags

NGSS.HS-LS3-1

Genetic code for a trait passed down from one generation to the next; genotype is expressed as a pair of letters (example: BB, Bb, or bb)

• genotype

• phenotype

• allele

• trait

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The observable, PHYSICAL traits of an organism that are passed from parent to children (physical description such as brown or blue eyes, straight or curly hair)

• phenotype

• genotype

• heterozygous

• homozygous

This allele always determines the phenotype whenever it is present. It is represented with an upper case letter (example: H, B, T)

• dominant

• recessive

• homozygous

• heterozygous

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

• recessive

• dominant

• homozygous

• heterozygous

A genotype that has identical pairs of alleles for a trait

• homozygous

• heterozygous

• genotype

• phenotype

A genotype that has a different pair of genes for a trait (example: Hh, Bb, Tt)

• homozygous

• heterozygous

• genotype

• pheotype