Introduction to Heredity

A segment of DNA that has the ability to code for a specific trait.

• gene

• allele

• chromosome

• chromatid

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

This type of allele is expressed whether there are one or two copies present.

• dominant

• recessive

• homozygous

• heterozygous

A variety or form of a gene.

• trait

• gene

• allele

• DNA

Tags

NGSS.HS-LS3-2

______ is the set of genes possessed by someone

• DNA
• Chromosome
• Genotype
• Phenotype

Tags

NGSS.HS-LS3-2

B=Blonde Hair b=Brown Hair
If a person was BB they would have

• Blonde Hair
• Brown Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B=Blonde Hair b=Brown Hair
If a person was Bb they would have

• Blonde Hair
• Brown Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Expressed only if NO dominant version is present

• homozygous
• heterozgyous
• allele
• recessive

Humans have _______ pairs of chromosomes, for a total of _______ chromosomes.

• 10, 20

• 25, 100

• 23, 46

• 46, 92

The physical expression of a trait.

• phenotype

• genotype

• chromosome

• allele

Tags

NGSS.HS-LS1-1

What are used to represent dominant alleles?

• numbers

• capital letters

• lowercase letters

• greek letters