Genetic Notes 7

allele

• different forms of a gene
• an offspring affected by a disorder
• male
• female
• Traces the path of inheritance from one generation to the next

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How is the allele each parent donates determined?

• It's random!
• different forms of a gene
• an offspring affected by a disorder
• male
• female

Tags

NGSS.HS-LS3-1

dominant allele

• one whose trait always shows up in the organism when the allele is present
• It's random!
• different forms of a gene
• an offspring affected by a disorder
• male

Tags

NGSS.HS-LS3-1

How are dominant alleles represented?

• capital letters
• one whose trait always shows up in the organism when the allele is present
• It's random!
• different forms of a gene
• an offspring affected by a disorder

recessive allele

• an allele that is hidden unless both alleles are recessive
• capital letters
• one whose trait always shows up in the organism when the allele is present
• It's random!
• different forms of a gene

How are recessive alleles represented?

• lowercase letters
• an allele that is hidden unless both alleles are recessive
• capital letters
• one whose trait always shows up in the organism when the allele is present
• It's random!

Homozygous

• both alleles are the same
• lowercase letters
• an allele that is hidden unless both alleles are recessive
• capital letters
• one whose trait always shows up in the organism when the allele is present

Heterozygous

• having two different alleles for a trait
• both alleles are the same
• lowercase letters
• an allele that is hidden unless both alleles are recessive
• capital letters

Genotype

• genetic makeup
• having two different alleles for a trait
• both alleles are the same
• lowercase letters
• an allele that is hidden unless both alleles are recessive

How is a genotype represented?

• letters
• genetic makeup
• having two different alleles for a trait
• both alleles are the same
• lowercase letters