Question

Which of the following best explains why you made two separate chromosomes of the same size from the beads?

Select one:

A. They represent the homologous pair of chromosomes an organism would get from its parents

B. They represent the duplicated chromosomes that appear as a result of DNA replication

C. They represent a set of chromosomes created as a result of nondisjunction

D. They represent two different chromosomes that are not a homologous pair

E. None of the above are explanations for why you made two chromosomes of the same size

Duplicated chromosomes are physically connected along an area of the chromosome known as the ____.

Select one:

A. Mitotic spindle

B. Centromere

C. Chromatin

D. Centrosome

E. Gene’s locus

It will be difficult to observe individual chromosomes during interphase because

Select one:

A. You can never observe an individual chromosome due to their small size

B. The chromosomes leave the nucleus and are dispersed within the cytoplasm

C. The DNA has not been replicated yet

D. The spindle must move the chromosomes to the metaphase plate before they are visible

E. The chromosomes are in their uncondensed/unwound form

Homologous chromosomes align along the metaphase plate during which stage of mitosis?

Select one:

A. Telophase

B. Anaphase

C. Metaphase

D. Interphase

E. Early prophase

The dividing cell shown here would be in___ of___. Assume that the starting cell was diploid and it was 2n = 4.

Select one:

A. Metaphase; meiosis II

B. Anaphase; meiosis I

C. Anaphase; mitosis

D. Metaphase; meiosis I

E. Metaphase; mitosis

Answer 1

Question 1

Answer-

Option A- The homologous chromosomes mean two chromosomes having the same gene genes at the same locus and will have the same size. One of them is maternal and one paternal in origin. Prior to the cell division, DNA duplication will occur during the S phase, but the duplicated DNA is formed as the sister chromatid.

Question 2

Answer - Option B - Centromere

The sister chromatids are physically connected in the centromere region of the chromosome. Mitotic spindle or spindle fiber is the cytoskeletal structure found in the eukaryotic cells. They are made up of microtubules and have a role in the movement of sister chromatids into the opposite poles during the mitosis. Chromatin is the form of DNA that appears as a thread and composed of DNA and proteins, called histones. The centrosome is an organelle found in the cell near to the nucleus from which the spindle fibers are originating during mitosis. Gene locus is a specific region in the chromosome where a particular gene is located.

Question 3

Answer- Option E

The chromosome condensation begins during the prophase of the mitosis. Prior to that, the chromosomes represent in an uncondensed form. The uncondensed cannot be distinguished into individual chromosomes.

Question 4

Answer- Option C- Metaphase

During the prophase, the nuclear membrane disappears and the chromosome condensation begins. During the metaphase, the chromosomes arrange on the metaphase plate and the spindle fibers attach with the kinetochore region. In the anaphase, the sister chromatids move to the opposite poles and in the telophase, the chromatids reach the opposite poles and the nuclear membrane begins to appear. In the interphase, the chromosomes are not condensed and they remain in the unwound forms.

Question 5

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