Advanced Placement (AP) Middle School

The root tip cells of an onion plant have 8 pairs of chromosomes. Which of the following correctly describes the number of chromosomes in an onion root tip cell at a specific stage of the cell cycle?
A. At the end of the synthesis phase, an onion root tip cell will have a total of 32 unique chromosomes.
B. In metaphase, an onion root tip cell will have a total of 16 unique chromosomes composed of 32 chromatids.
C. After cytokinesis, a daughter onion root tip cell will have a total of 8 unique chromosomes.
D.After cytokinesis, a daughter onion root tip cell will have a total of 32 unique chromosomes. Plz answer quickly

Answers

Answer 1

Explanation:

The root tip cells of onion were used to test the potentially genotoxic effects of Alprazolam. The test was carried out according to Fiskesjö protocol (4, 11-12) with some modifications. Common onion (Allium cepa L.) has eight pairs of relatively large chromosomes (2n = 16) that allows for the easy detection of CAs.

Answer 2

The correct description of the number of chromosomes in an onion root tip cell is at the end of the synthesis phase, an onion root tip cell will have a total of 32 unique chromosomes. The correct option is A.

What is the cell cycle?

In response to the question, we must demonstrate the claim that accurately defines the number of chromosomes present in an onion root tip cell at a particular point of the cell cycle.

This demonstrates that a chromosome is a DNA molecule that carries genetic information and passes through a number of stages throughout cell division.

Onion root tip cells were employed to assess Alprazolam's possible genotypic effects.

Therefore, the correct option is A. At the end of the synthesis phase, an onion root tip cell will have a total of 32 unique chromosomes.

To learn more about the cell cycle, visit here:

https://brainly.com/question/25282664

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