BIOL 101 - Quiz 3: Lessons 9-10

A human bone marrow cell in the prophase stage of mitosis contains 46 chromosomes. Therefore, there are a total of __________ sister chromatids in this cell.

92

On top is a cell in metaphase I. When normal meiosis completes in this cell, which of the following is a possible gamete that can form?

D

Which statement regarding sexual and asexual reproduction is true?

Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.

An experiment was done with two different cell lines, both were isolated from tumors. An experiment was done in which the same number of cells was taken from each line and allowed to grow either suspended (cells could not anchor to the plastic at the bottom) or on plastic After several days the scientists counted the number of colonies present in each cell line in each environment. They concluded that one of the two lines was exhibiting traits of metastasis. Which line?

TEK3

The M phase of mitosis and M phase of meiosis both occur after interphase. However, the two processes differ in the arrangement and behavior of their chromosomes. How?

The pairing up of homologous chromosomes and crossing over only occur during meiosis.

A cell biologist carefully measured the quantity of DNA in grasshopper cells growing in cell culture. Cells examined during the G2 phase of the cell cycle contained 200 units of DNA. What would be the amount of DNA in one of the grasshopper daughter cells?

100 units

If the receptor in a cell's stimulative pathway for cell division is non-functional, the result will be that the cell:

divides less often

In some organisms such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would be the consequence of this?

large cells containing many nuclei

What is probably the main factor responsible for the phenomenon of density-dependent inhibition?

physical contact of cell-surface proteins between adjacent cells