In the F2 generation of Mendel's crosses, ONE IN FOUR PLANTS HAD TWO ALLELES FOR THE RECESSIVE TRAIT.
In Mendel's crosses, there are two types of generation; F1 and F2. The F1 generation refers to first filial generation that was obtained when the parents plants were cross pollinated. The F2 generation refers to the second filial generation that was obtained by self pollinating the F1 generation plants.
In the F2 generation of Mendel crosses, only one in four plants had two alleles for the recessive trait.
A cell membrane would most likely be close to an egg structure. A cell membrane is a selective permeable to ions and organic molecules and controls the movement of substances in and out of the cell.
The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the lipid bilayer with embedded proteins.