How many dominant alleys is needed for the dominant trait to show up

At least one

Explanation:

Dominant alleles live up to their name - they dominate over the recessive traits. Therefore, if one parent has one dominant allele and the other parent has two recessive alleles, 50% of the offspring will have dominant traits.

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."