Why is the lower jaw movable in human skeleton?

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Aboy with an extra x chromosome probably has which of the following syndromes?