A micrograph of a mutated dividing cell from a zebrafish showed 19 chromosomes, each consisting of two sister chromatids. Which of the following stages of cell division would you expect such micrograph have been taken? a. prophase I of meiosis b. telophase II of mitosis c. prophase of mitosis d. prophase II of meiosis

A micrograph of a mutated dividing cell from a zebrafish showed 19 chromosomes, each consisting of two sister chromatids. Which of the following stages of cell division would you expect such micrograph have been taken? a. prophase I of meiosis b. telophase II of mitosis c. prophase of mitosis d. prophase II of meiosis

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter6: Reproduction At The Cellular Level

Section: Chapter Questions

Problem 5RQ: Separation of the sister chromatids is a characteristic of which stage of mitosis? a. prometaphase...

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What is the fundamental difference between mitosis and meiosis? A. DNA is replicated twice in meiosis, but only once in mitosis. B. The number of DNA molecules per cell nucleus is cut in half in meiosis but remains constant in mitosis. C. The number of chromosomes doubles in meiosis, whereas it stays the same in mitosis. D. Mitosis involves two cell divisions, whereas meiosis only involves one.
a. What type of cell division mitosis, meiosis I or meiosis II is shown in this figure? b. What is the diploid number of this organism? c. Provide labels for (i) and (ii)
imagine a giraffe whose diploid is 30. A) what # of chromosomes will be present in a somatic cell at prophase of mitosis? B) what will be the # of chromosomes present in a somatic cell at prophase 2 of meiosis?
a. What phase of Meiosis II is the cell in? How do you know? b. Assuming all of the chromosomes present during Meiosis II are shown in the figure above, how many chromosomes (counting homologous pairs as two chromosomes) does a gamete from this organism have? c. Draw the same cell during the same phase of Meiosis I. Label the elements.
a) In which stage of mitosis do chromosomes condense? (b) If a eukaryotic organism has a total of 34 chromosomes, how many pairs will the chromosomes be arranged in? (c) Define homologous chromosomes.
What is the key difference between daughter cells resulting from mitosis and meiosis? In humans, the 4 daughter cells of meiosis contain how many chromosomes? A parent cell has 10 chromosomes. If one daughter cells after mitosis has 9 single chromosomes and the other has 9 single chromosomes and 1 double chromosome, when did the error occur?
A) Give the diploid number of this organism. B) Is it mitosis or meiosis? Give two (2) elements on which you base your reasoning. C) Identify this mystery phase of the cell cycle. D) How many daughter cells will be produced at the end of the process and how many chromosomes (in numbers) will they contain? E) How does this process ensure the genetic variability of individuals of the species? Your answer must be based on two (2) different elements.
A diploid male organism has two homologous chromosomes. A and B are from its maternal parent, while A’ and B’ are from its paternal parent. Draw the chromosomes at the following stages: a, anaphase of mitosis b. anaphase of the first meiotic division c, anaphase of the second meiotic division If the same chromosomes were involved in meiosis in a female, would the kind of egg nuclei produced be different from the sperm nuclei? Why?
Which of the following describes the state of chromosomes in metaphase II? a two chromatids joined at the centromere b individual chromosomes c homologous pair d haploid daughter cells
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If you arrested a human cell in metaphase I of meiosis and applied this technique, what would you observe? How would this differ from what you would see in metaphase of mitosis?
If you have 16 chromatids inside the cell before meiosis, how many chromosomes will be present in each daughter cell after meiosis?