Which example describes an inherited trait that cannot be determined by observing an individual?
a.
blood type
b.
skull size
c.
finger length
d.
skin color

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

the real answer is b. scintillation counter