The parts of a chromosome are labeled. The top, shorter portion is labeled a.
Which is indicated by the letter a?
petit arm
queue arm
centromere
gene

.

petit arm

explanation:

all human chromosomes have 2 arms, the p (short) arm and the q (long) arm. they are separated from each other only by a primary constriction, the centromere, the point at which the chromosome is attached to the spindle during cell division.

the symbol "p" stands for "petit", small in French, while "q" was chosen merely because it was the next letter in the alphabet.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

b. to discover aspects of the natural world.

hopefully i .