7.3-expression of dominant and recessive phenotypes

• dominant allele

  • peaked hair
  • free ears
  • no red

  recessive

  • straight hair
  • attached ears
  • red
• carriers- a heterozygous with a recessive allele that is expressed in the phenotype
• co dominance- 2 alleles of a gene that are expressed equally.
• incomplete dominance- no allele is dominant over another and blends 2 forms of characteristics.
• Complete dominance-normal dominance