Incomplete dominance

Heredity Patterns

Heredity Patterns Complete dominance Incomplete dominance Codominance Multiple allelles Sex-linked Inheritance Polygenic Inheritance Multifactorial Inheritance Heredity Patterns

Cross a dominant red flowered plant with a white recessive flowered plant Cross a homozygous dominant red flowered plant with a white recessive flowered plant Cross a heterozygous red flowered plant with a white recessive flowered plant

In means NOT So incomplete dominance means NOT COMPLETE It shows a different phenotype

1.Cross a homozygous dominant black feathered chicken with a recessive white feathered chicken BB X bb all off spring will be Bb 2. Cross a heterozygous black feathered chicken with a recessive white feathered chicken Bb X bb Codominance

What does “CO”mean. So What do you think codominance mean What does “CO”mean? So What do you think codominance mean? If I have a white feathered chicken and a black feathered chicken predict what you think the phenotype of the chick will be Codominance

Codominance Both alleles manifest seperately in the phenotype. A 3rd alleles manifests which is a combination of both homozygotes. Both alleles contribute to the phenotype Example: A cross between a white cow and a brown cow which gives a combination of both colors WW X RR  RW X

 

In chickens, black feather color (BB) is codominant to white feather color (WW).    __________      X      ________   What is the phenotype of the cross?   

X

What are Codominance and Incomplete Dominance? Codominance – When BOTH alleles are expressed Incomplete dominance – When a BLEND of both traits is expressed  + 