Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :
In dogs,phenotype A (erect ears and barking while following a scent) is caused by dominant alleles;phenotype B (droopy ears and silent while following a scent) is caused by recessive alleles.A dog that is homozygous for both traits of phenotype A is mated to a dog with phenotype B.
-If the genes for the two traits are unlinked,and the F₁ generation is crossed,what is the expected phenotypic ratio of the F₂ generation?

A) 9:3:3:1 (A:erect silent:droopy barking:B)
B) 1:1 (A:B)
C) 1:0 (A:B)
D) 1:2:1 (A:erect silent:B)
E) 4:1 (A:B)