During what phase of mitosis is chromatin converted into the visible chromosomes

Question

During what phase of mitosis is chromatin converted into the visible chromosomes by & super ? a. Prophase b. Metaphase c Anaphase d. Telophase Centromere breaks or "centromere spills" into two chromatids during following mitotic phase: a. Prophase b. Metaphase c. Anaphase d. Telophase Which of the following cell division types reduces the chromosome number? a. Mitosis b. Meiosis I c. Meiosis II d. Cell cycle Identify synapsis during prophase I from the following: a. Physical exchange of genetic material b. Pairing of homologous chromosomes c. No movement of chromosomes d. Formation of cross What happens during crossing over? a. Physical exchange of genetic material b. Pairing of homologues c. No movement of chromosomes d. Formation of cross What is the name the "physical cross" that non-sister chromatids of the homologous chromosomes make during prophase I? a. Synapsis b. Spindle c. Chiasmata d. Equatorial plate "Chromosomes pairs" line up at equator during: a. Prophase I b. Metaphase I c. Anaphase II d. Metaphase II Oogenesis results in how many functional cells? A. 1 b. 2 c. 3 d. 4 Sordaria spend the majority of their life cycle as... a. Haploids b. Diploids c. Zygotes d. Seeds Sordaria Ascospores are contained in what structure? a. Sperm-sac b. Gamates- pouch c. Ascus d. Zygote How many ascocpores are contained together? a. 2 b. 4 c. 6 d. 8

Explanation / Answer

Please find the answers below:

Part 1: Choice b (Metaphase represents the terminal stage of mitosis in which the invisible thread-like chormatin condenses and supercoils to become visible chromosome-like structure. Arrangement of chromosomes in the equator is a visible proof for chromatin condensation)

Part 2: Choice c (During anaphase stage, the centromere splits into two equal halves and start moving towards the respective poles of the spindle fibre to distribute the chromosomes into equal halves in the resultant daughter cells)

Part 3: Choice b (Meiosis I represents the reductional type of cell division and is a hallmark of gametogenesis process. Meiosis II is similar to mitosis where no reduction in chromosome number takes place)

Part 4: Choice b (Pairing of homologous chromosomes across their lengths represents the first stage of synapse formation during cell division which further proceeds into chiasmata formation and exchange of genetic material)

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