Final answer:
Animals on the hominidae family tree, except for humans, have 24 pairs of chromosomes. Humans have 23 pairs of chromosomes, including autosomes and sex chromosomes.
Step-by-step explanation:
Animals on the hominidae family tree, except for humans, have 24 pairs of chromosomes. This includes great apes such as chimpanzees, gorillas, and orangutans. Humans, on the other hand, have 23 pairs of chromosomes. The first 22 pairs are autosomes, and the 23rd pair is the sex chromosomes, with females having two X chromosomes and males having one X and one Y chromosome.