Variations of Mendelian

• What did geneticists discover about traits in modern genetics?

  Not all traits follow the Mendelian principles of inheritance.
• What does it mean that not all heterozygous alleles will express the dominant trait?

  It means that some organisms may not show the dominant trait even if they have heterozygous alleles.
• How many alleles can some organisms have that lead to multiple phenotypes?

  Three alleles.
• What is an example of multiple phenotypes resulting from alleles?

  The alleles for blood types in humans.
• What is incomplete dominance in genetics?

  It is a type of non-Mendelian inheritance where neither allele is dominant or recessive.
• What is produced in incomplete dominance instead of just two phenotypes?

  An intermediate phenotype.