Cells need to intake things like nutrients, water, and oxygen, and they need to be able to export things like metabolic products and waste materials. No matter which direction the material is moving in, it needs to cross the cell membrane at some point.
Answer: 100%
Explanation: If both guinea pigs are BB dominant, that means they don't have the recessive trait, so therefore no heterozygous guinea pigs will be created. This leaves 100% homozygous offspring.
