Click on the image the question on in the image

1. This image shows crossing over of chromosomes.

2. First pair of chromosomes on left is called homologous chromosomes.

3. Crossing over takes place in pachytene stage of prophase I in meiosis.

4. In human egg cell XX while in human sperm cell XY.

Hope this helps you.

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

substitution is the answer in this case