#3 Alleles

A variety or form of a gene.

• trait

• gene

• allele

• DNA

Tags

NGSS.HS-LS3-2

Recessive Traits show up 

• Always
• Only when there are two

Dominant Traits show up 

• Always
• Only when there are two

Expressed only if NO dominant version is present

• homozygous
• heterozgyous
• allele
• recessive

What are used to represent dominant alleles?

• numbers

• capital letters

• lowercase letters

• greek letters

What does the notation Tt mean to geneticists?

• two dominant alleles

• one dominant and one recessive allele

• homozygous alleles

• two recessive alleles