Genetics Vocabulary

The genetic makeup of a trait. For example: Tt or TT (T = tall height)

• Genetics
• Genotype
• Chromosome
•  Eye color

The physical characteristic of a trait. For example: A tall pea plant

• Genotype
• RNA
• DNA
• Phenotype

The different forms of a gene. For example: yellow vs. green seeds

• Punnet Square
• Homologous Chromosomes
• Allele
• Gene

Having two of the same alleles for a trait. For example: TT or tt

• Homozygous
• Heterozygous
• Dominant
• Recessive

Having two different alleles for a trait. For example: Tt

• Homozygous
• Heterozygous
• Dominant
• Recesive

This describes an allele's ability to mask the recessive form and is represented by a capital letter.

• Homozygous
• Heterozygous
• Dominant
• Recessive

This describes an allele's inability to mask the dominant form and is represented by a lower case letter.

• Homozygous
• Heterozygous
• Dominant 
• Recessive

This grid shows the possible gene combinations that result from a genetic cross.

• Homologous Chromosome
• Punnett Square
• Mendelian Genetics
• Heredity Grid

Offspring

• made of DNA and carry genetic information

• the passing of traits from parent to offspring

• a parent's child or children

• an organism's genetic makeup

Genotype

• an organism's physical appearance

• an organism's genetic makeup or allele combination