Which of the following best explains the difference between dominant and recessive traits? A. Dominant traits always appear, eve
n when combined with a recessive allele. B. Dominant traits only appear when combined with a recessive allele.
C. Recessive traits always appear, even when combined with a recessive allele.
D. Recessive traits only appear when both alleles are dominant.
Muscles can also receive messages from the brain when the body temperature decreases. They respond by shivering. Shivering causes the muscles to contract and relax quickly. This process generates heat.