AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A student view onion cells under a microscope and notices the cells are reproducing by mitosis.Which hypothesis is supported by this?
A
the cells all have the same chromosomes
B
the cells each have a unique genetic make-up
C
the cells produce identical gametes
D
the cells split to form stem cells
Explanation: 

Detailed explanation-1: -To observe mitosis in onion root tip cells and record the different phases of mitosis. Hypothesis: It is expected that the most common phase of mitosis seen will be interphase as the cell spends around ninety percent of its time in this phase.

Detailed explanation-2: -From examination of two images taken under a microscope, approximately 450 cells were tallied. Approximately 60% of the cells were in interphase. The next most common stage observed was prophase, and 35% of cells were in this phase.

Detailed explanation-3: -The conclusion of this lab was that Mitosis is essential for the production of new cells. In the case of the onion root sample, the cells were damaged leading to the tester to undergo Mitotic cell division and it was found that mainly Interphase and Prophase were the stages that occurred in this lab.

There is 1 question to complete.