Which of the following mechanisms contributes to genetic variation through sexual reproduction via the random orientation of pairs of homologous chromosomes at metaphase of meiosis I?   A. crossing over   B. random fertilization   C. independent assortment of chromosomes   D. cytokinesis

In which of the following cases is it ALWAYS true that a cell division produces two daughter cells that are genetically different? O A. Meiosis Il only B. Mitosis and meiosis I C. Mitosis only D. Meiosis I and meiosis II E. Meiosis I only F. All cell divisions result in genetically distinct daughter cells

Separation of homologous chromosomes during Meiosis I requires: Select one: a. Removing centromere cohesion b. Nondisjunction c. Separase   If nondisjunction occurred during Meiosis II: Select one: a. We assume all other meiotic events occurred normally b. All four gametes will be abnormal c. There is a higher risk that a second nondisjunction event occurred

What word below best describes the orientation of maternal relative to paternal chromatids of each bivalent chromosome at the metaphase plate in Meiosis I?   A. ordered   B. random   C. elastic   D. organized

The haploid gametes of a diploid organism with 2n = 98 chromosomes would contain how many chromosomes? а. 14 b.33 с. 49 d. 98 е. 196 QUESTION 47 2 During the cell cycle, in which sub-phase(s) of interphase does the cell replicate its chromosomes? O a. G1 phase b. S phase c. G2 phase Od. G1 and G2 phases e. G1, S, and G2 phases

Polyploidy can occur by either fertilization of two unreduced gametes or by endoreduplication of an otherwise normal zygote prior to cell division. In which of the following types of organism is this most often observed?   a. Prokaryotes   b. Plants   c. Animals   d. Mammals   e. Aliens from outer space

Meiosis is an important cellular process for organisms that reproduce sexually. Two lab partners (A and B) are shown this diagram of a meiotic cell and asked to identify its phase. Partner A believes that this cell is in prophase of the first meiotic division. Partner B believes that this cell has moved past prophase of meiosis I and is in a later phase of meiosis. Which partner is correct, and what evidence accurately would defend their belief? Partner A is correct. The chromosomes have clearly replicated during interphase and are beginning to decondense into chromatin. O Partner A is correct. The nuclear membrane is beginning to re-form and centrioles are beginning to migrate to opposite poles of the cell. Partner B is correct. Homologous chromosomes are no longer paired together, so the cell must be in first phase of meiosis II, not meiosis I. O Partner B is correct. The cell plate is beginning to form between the two centrioles, indicating the cell is actually in later phase of…

Gametes are formed in Select one: a. Mitosis b. Meiosis c. None of the above mentioned

At the end of meiosis I, which of the following remains attached? A. Sister chromatids B. Homologous chromosomes C. Tetrads 36

In which stage of meiosis is the chromosome number halved?   A. Prophase I   B. Telophase I   C. Metaphase I   D. Anaphase I