Answer:
I guess its Population
I'm not sure im just trying to help
From what I believe, 50%. The chromosome from the father can either be X or Y, so it’s a chance to carry it in the X gene if the child is a girl. If its a boy, then it has no chance of carrying the gene. Hope this helps
Contour plowing created grooves in the soil. Because the bottom of each groove is at the same elevation throughout its length, rainfalls will get trapped in each groove instead of running rapidly downhill toward the stream, carrying the top soil with it
hope this helps
im pretty sure its B. not exactly sure tho