Exam 2: Cells and Cell Division

Some cells retain the capacity to divide throughout their life cycle,whereas others do not divide in adulthood.Give one example of each type.

Primary oocytes and spermatogonia are both haploid cells.

Autosomal chromosome pairs are identical,whereas the sex chromosome pair in males is not.

A cell that cannot form spindle fibers cannot ____.

Briefly summarize the four phases of mitosis and cytokinesis.

A polar body,once formed,has no further function and dies.

Cells are largely constructed from four classes of large molecules called ____________________.

Proteins function ____.

In both progeria and Werner syndrome,cells are switched from a growth to a maintenance mode,halting ____________________.

A cell in G0 state ____.

In meiosis,sister chromatids separate and move to opposite poles of the spindle during ____________________.

In meiosis,cells become haploid ____.

In meiosis,homologous chromosomes separate in ____.

Figure -All cells are fundamentally similar at a structural level.Using the accompanying diagram of a generalized human cell,name as many of the numbered labels as you can to illustrate this idea.

In the cell cycle,the G1 phase represents ____.

A rare genetic disorder called Gaucher disease may strike as many as one in 450 people of ____ descent.

In mitosis,chromatids separate and move to the center of the cell during ____________________.

Macromolecules including sugars,glycogen,and starches composed of sugar monomers linked and cross-linked together are known as ____.

Compare and contrast the events and results of oogenesis and spermatogenesis.

The only cytoplasmic organelles in animal cells aside from nuclei that contain DNA are ____________________.