The first sign of cleavage is the appearance of a cleavage furrow in the cell surface near the old m

The first sign of cleavage is the appearance of a cleavage furrow in the cell surface near the old m

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
The first sign of cleavage is the appearance of a  cleavage furrow  in the cell surface near the  old metaphase plate. On the cytoplasmic side of the cleavage furrow is a contractile ring of actin microfilaments  associated with molecules of the motor protein myosin. Contraction of the ring pinches the cell in two. Cytokinesis in plants, which have cell walls, involves a completely different mechanism. During telophase, vesicles from the Golgi apparatus move along microtubules to the middle of  the cell, where they coalesce to form a  cell plate . Cell wall materials carried in the vesicles collect in the cell plate as it grows. The plate enlarges until its membranes fuse with the plasma membrane at the perimeter. The contents of the vesicles form new cell wall material between the daughter cells. Mitosis in eukaryotes may have evolved from binary fission in bacteria. Asexual reproduction of single-celled eukaryotes, such as an amoeba, includes mitosis and 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

The first sign of cleavage is the appearance of a cleavage furrow in the cell surface near the old m

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online