During sexual reproduction, gametes fuse to form a zygote. Sometimes when gametes are formed during meiosis, the chromosomes do not completely separate. When a gamete with an extra
chromosome fuses with another gamete to form a zygote, the result is usually a genetic disorder. This
occurrence is an example of which chromosome process?
A. Deletion
B. duplication
C. inversion
D. crossing over

c.more precipitation,but only when emission levels.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands