Question

question 26
when a eukaryotic cell undergoes cellular division, creating two new daughter cells - an error (nondisjunction) in which step
would most likely impact the number of chromosomes in the daughter cells nuclei.
what is this step?
o a telophase in interphase
o b anaphase in mitosis
o c prophase in endocytosis
o d metaphase in mitosis

question 27
review this diagram; select the response that best describes label #1.

o a chromatin
o b centromere
o c chromatid
o d sister chromosomes

Explanation:

Question 26

During anaphase of mitosis, sister chromatids are pulled apart to opposite poles of the cell. Nondisjunction occurs when sister chromatids (or homologous chromosomes in meiosis) fail to separate properly. If this happens in anaphase of mitosis, it directly affects the distribution of chromosomes to daughter cells. Telophase is about re - forming nuclei, prophase in endocytosis is not a relevant step for chromosome number in mitosis - related daughter cells, and metaphase is about chromosome alignment, not separation in the context of nondisjunction affecting chromosome number as directly as anaphase.

Chromatin is the less condensed form of DNA (and associated proteins) in the nucleus during interphase. The centromere is the constricted region of a chromosome. Sister chromosomes is an incorrect term (it should be sister chromatids). Chromatid: A chromatid is one of the two identical halves of a replicated chromosome. In the diagram, label #1 represents a chromatid.

Answer:

B. Anaphase in mitosis

Question 27