Genetics

The term for the different forms of a trait. 

• DNA
• Chromosomes
• Genes
• Alleles

The trait that always shows. 

• Dominant 
• Recessive
• Hidden
• Overt

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-LS1-1

If a trait is homozygous the letters are the 

• Same
• Different

If you are homozygous recessive, the genotype would be 

• AA
• aa
• Aa

Tags

NGSS.HS-LS3-1

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

• The same 
• Different

Tags

NGSS.HS-LS3-2

If you are homozygous dominant, the genotype would be 

• AA
• aa
• Aa

If you are heterozygous, your genotype would be

• AA
• aa
• Aa

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3