GENETICS REVIEW

The term for the different forms of a trait. 

• DNA
• Chromosomes
• Genes
• Alleles

The hidden trait.  You need two of these alleles for the trait to show.

• Dominant
• Recessive
• Hidden
• Overt

The genetic makeup of a trait.  (The letters represent this)

• Genes
• Phenotype
• Genotype
• Characteristics

Tags

NGSS.HS-LS3-1

If a trait is homozygous the letters are the 

• Same
• Different

If you are homozygous recessive, the genotype would be 

• AA
• aa
• Aa

If you are homozygous dominant, the genotype would be 

• AA
• aa
• Aa

If a trait is heterozygous, the letters (alleles)are 

• The same 
• Different

If you are heterozygous, your genotype would be

• AA
• aa
• Aa

Tags

NGSS.HS-LS3-2

Another term for homozygous is

• Hybrid 
• Purebred
• Recessive
• Dominant

Another term for heterozygous is

• Hybrid
• Purebred
• Dominant
• Recessive