Incomplete Dominance Codominance

Front

What is incomplete dominance?

Back

A genetic situation where one allele does not completely dominate another allele, resulting in a phenotype that is a blend of the two traits.

Front

What is codominance?

Back

A genetic situation where both alleles for a gene are fully expressed, resulting in offspring with a phenotype that shows both traits distinctly.

Front

Give an example of incomplete dominance.

Back

A long-haired rabbit crossed with a short-haired rabbit produces offspring with medium-length fur.

Front

Give an example of codominance.

Back

A red flowered plant crossed with a white flowered plant produces offspring with red and white striped flowers.

Front

What is the phenotype of a child with one curly hair allele and one straight hair allele?

Back

Wavy hair, due to incomplete dominance.

Front

In a cross between a red flowered plant (RR) and a white flowered plant (WW) with incomplete dominance, what color will the offspring be?

Back

All offspring will be pink (RW).

Front

What percentage of offspring will have red flowers when a red flowered plant (RR) is crossed with a white flowered plant (WW) under incomplete dominance?

Back

0%.

Front

What does it mean if a trait is expressed in a codominant manner?

Back

Both traits are visible in the phenotype of the organism.

Front

How can you identify incomplete dominance in a genetic cross?

Back

Look for a phenotype that is a blend of the two parental traits.

Front

What is the result of a cross between two heterozygous individuals (RW x RW) in incomplete dominance?

Back

1 red (RR): 2 pink (RW): 1 white (WW) ratio.