In humans, the allele for brown eyes (
b. is dominant to the allele for blue eyes (
b. what is the probability that two heterozygous brown-eyed parents will have a child with blue eyes?

its d i know cause i've been googling it

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.