In mendel's experiment, why did wrinkled seeds show up in the f2 generation even though it they were not present in the f1 generation

This was due to the parent plants of the F1 generation being true breeding dominant and recessive respectively.

Wrinkled seeds are products of the recessive allele, and round seeds are products of the dominant allele.

This caused all of their offspring in the F1 generation to be heterozygous, and therefore still possessing the dominant allele. This caused the seeds to not be wrinkled, but round.

Then when Mendel crossed two of the heterozygous F1 generation plants, of the F2 generation plants were homozygous recessive, giving them wrinkled seeds.

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle