AP BIO Type of Dominance

True Breeding: If one individual is crossed with itself then all of the possible offspring have the same:

phenotype and genotype

F1,_ generation of_

1st, offspring

Generation produced when the F1 generation is crossed with itself (eachother)

F2

A blended phenotype appear in the offspring

incomplete dominance

Occurs when two traits are expressed simultaneously

Codominance

A white mouse crossed with a yellow mouse produces cream offspring

incomplete dominance

The zore’s coloration appears to be an example of

Codominance

A red cow(RR) is crossed with a white bull (WW) this produces the offspring that are roan (RW)

Codominance

What type of dominance?

Codominance

When a trait is completely dominant (Mendelian)

Up to two phenotypes are possible

In COMPLETE Dominance, when two different alleles are present the allele that is completely expressed is the

Dominant Allele

Type AB Blood is an example of

Codominance

True Breeding: Red Flowers crossed with true-breeding white flowers produce all pink flowers.

Incomplete Dominance

An example of when both alleles contribute to the phenotype

Codominance

A red flower(RR) crossed with a White Flower (rr), all the pink flowers have the genotype

Rr

A roan cow would have the genotype

RW

What is true about Incomplete Dominance?

Heterozygotes will show the phenotype of a mixture of the two alleles

Incomplete dominance is characterized by what appears to be the _ of alleles

Blending

Codominance is when

2 types of alleles are equally dominant

In Codominance, what is the appearance of the heterozygote?

Both dominant and recessive alleles are seen (Spots/Blotches)