Question

Describe the inheritance patterns of incomplete dominance, multiple alleles, codominance, pleiotropy, and polygenic inheritance. Provide an example of each.

Answer 1

Incomplete dominance - is a type of inheritance where one allele is not completely dominant over other alleles. Ex: if you cross pollinate a red tulip with a white tulip , the dominant red allele will not be completely dominant over the recessive white allele. producing a pink tulip

Answer 2

Multiple alleles- Three or more alleles for a particular gene. Ex:The human ABO blood type is a good example of multiple alleles.humans can have red blood cells that are of type A, type B, or type O.

Answer 3

Co-dominance-A condition in which the alleles of a gene pair in a heterozygote are fully expressed thereby resulting in offspring with a phenotype that is neither dominant nor recessive.Ex:Type AB blood is an example of co-dominance.The A allele and the B allele are equal in their dominance and will be expressed equally if they are paired together into the genotype

Answer 4

pleiotropy-occurs when one gene influences multiple genes. Ex: phenylketonuria, which is a human disease that affects multiple systems but is caused by one gene defect.

Answer 5

Polygenic inheritance - Polygenic inheritance involves a trait that is controlled by more than one gene locus. Many inheritable disease are controlled by more than one locus, as are hair color, eye color, and skin color.
Ex:Cancer ,Cleft palate ,Height ,Weight ,Skin colour

Answer 6

hope that helped :)