Use this illustration of cells of a beetle species in metaphase or anaphase of m

Question

Use this illustration of cells of a beetle species in metaphase or anaphase of mitosis or meiosis. Paternal chromosomes are black and maternal chromosomes are white. Not all the cells exhibit chromosomal configurations that would actually be found in nature. Which of the cells are in each of the following cell cycle phase? You will not use some of the letters, but letters you do use will be used only once each. Assume these cells have no crossing over. Metaphase of mitosis Metaphase 1 of meiosis Metaphase 2 of meiosis Anaphase of mitosis Anaphase 1 of meiosis Anaphase 2 of meiosis

Explanation / Answer

Please find answers below and reasons in parentheses:

Metaphase of mitosis: A (In this phase, the homologous chromosomes lie at the equator with their chromatids towards the poles. Here, the maternal and paternal chromosomes lie side by side of each other. When this phase proceeds, half of the chromosomes move to one pole and rest of the half move to anothr pole.)

Metaphase I of meiosis: H (This phase is similar to the metaphase of mitosis but the only difference is that the chromosomes are single and not homologous in nature. This is why when metaphase I of meiosis proceeds, the sister chromatids split and half of the chromosomes move to one pole and rest half to another. This results in reducing the number of chromosomes half in the gametes)

Metaphase 2 of meiosis: F (In this phase, the single sets of chromosomes lie at the equator of the spindle.)

Anaphase of mitosis: G (In this stage, the homologous chromosomes move towards respective poles. This causes segregation of half set of chromosomes to one pole and another half to one pole. However, the total number of chromosomes towards each pole remains same as a diploid cell)

Anaphase 1 of meiosis: B (In this stage,the maternal and paternal chromosomes split from their nucleolus and move to respective poles. This causes reduction in number of chromosomes to half in the resultant cells)

Anaphase 2 of meiosis: E (In this stage, the respective chromatid arms move to either side of the spindle just as anaphase of mitosis. Preceding to it, the nucleolus does not split thus there is no reduction in number of chromosomes in the resultant cells.)

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.