Complex Patterns of Inheritance
By: Jahlei Jones
Multiple alleles
Definition: series of three or more alternative or Allelic forms of a gene.
Offspring phenotype: There are no offspring phenotype
Example(s):
1)Blood type A is an example of Multiple Alleles.
2)Different hair colors and multiple alleles examples.
Incomplete dominance
Definition: a genetic situation in which one allele does not completely dominate another allele, and therefore results in a new phenotype.
Offspring phenotype:It will be a mix between the two parents.
Examples:
1)A snapdragon flower that is pink as a result of cross-pollination between a red flower and a white flower when neither the white or the red alleles are dominant.
2)A child with wavy hair as a result of one parent's curly hair and the other's straight hair.
Codominance
Definition:a relationship between two versions of a gene.
Offspring phenotype: Both parents traits will be seen in the off spring
Example(s):
1) A Red flower and a white flower will create a red and white spotted flower.
2)A white chicken and a black chicken will create a chicken that is checkered with white and black.
Polygenic traits
Definition: one whose phenotype is influenced by more than one gene.
Offspring phenotype: Traits that display a continuous distribution, such as height or skin color.
Example(s):
1)A humans skin color is an example
2)A humans height is another example