Exam 27: Chromosomes and Cell Division

The ________ are the 22 pairs of chromosomes not including the X and Y chromosomes.

Oogenesis differs from spermatogenesis in ________.

Eukaryotic cell division consists of interphase and cell division. Explain what happens in the three parts of interphase (G1, S, and G2).

DNA that has wrapped around histones and is in a condensed form following interphase is called ________.

What is decreased during the process of meiosis?

Suppose that mitosis were used to produce the gametes. What unique problems would be encountered? Make a prediction about the future of humans as a species.

How do mitosis and meiosis differ from each other?

The process of oogenesis is completed at ________.

A baby is born with the genotype XYY. This sort of disorder is the result of nondisjunction during meiosis. In the case of the XYY genotype, can you be certain which parent had the nondisjunction in his or her gamete? Explain your answer.

An entire cell cycle can be completed in about ________.

If a cell begins mitosis with 36 chromosomes, there will be ________ chromosomes in each cell after mitosis, and each daughter cell will be ________ genetically.

Crossing over occurs during ________ and is important because it ________.

Complete the following table concerning mitosis and meiosis:

Nondisjunction could occur during ________.

The part of the cell cycle that is preparation for cell division and that precedes mitosis is called ________.

Cancer is associated with problems related to the regulation of ________.

________ is a syndrome that occurs in females who have only a single X chromosome (XO).

Two replicated chromosomes are joined together at a region on the chromosome called the ________.

The exchange of genetic material between nonsister chromatids of a homologous pair in meiosis is called ________.

A process that is part of the cell cycle and parcels out the duplicated copies of genetic material for cell division in eukaryotes is called ________.