In an organism with a haploid number of , how many possible combinations of maternal and paternal chromosomes can occur in its gametes? Select one: a. 72=49 b. 27=128 c.17=1 d. 214=16 384

A cell goes through meiosis in order to separate a set of replicated chromosomes into two haploid cells and then to separate these cells again without copying the DNA to form four haploid cells.   The following diagram illustrates how chromosomes are divided up during the two splits in meiosis.   For each split in meiosis, you will see three different representations of chromosome division. Select the answer option for each split that correctly shows the way meiosis divides the chromosomes. Which one shows the Second Meiosis Split?

Germ cells are specialized cells that develop into gametes. Gametes are produced through the process of meiosis. If the haploid number for monkeys is 27 chromosomes, how many chromosomes does a cell undergoing division have at each of the following phases? Select the row that correctly shows the number of chromosomes at each phase. Select one: a. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 27 54 54 27 b. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54  27 27  27 c. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54 54 27 27 d. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54 54 54 27

Page 1 of 1 USING TWO DIFFERENT COLORS TO SIGNIFY THE MATERNAL AND PATERNAL CHROMOSOMES, DRAW THE RESPECTIVE CELLS IN EACH LABELED PHASE OF MITOSIS AND MEIOSIS. THE CHROMOSOME NUMBER WILL BE "4" AND SHOULD BE REPRESENTED AS TWO HOMOLOGOUS PAIRS. MAKE SURE YOU USE TWO DIFFERENT SIZES FOR EACH OF THE PAIRS. BELOW EACH PHASE, BRIEFLY DESCRIBE WHAT HAPPENS. MITOSIS MEIOSIS I Crossing over needs to be illustrated in one of the homologous pairs and carried through the remaining drawings METAPHASE ANAPHASE METAPHASE I MEIOSIS II Accurate number of cells are needed ANAPHASE I METAPHASE II ANAPHASE II

Construct a table for the different stages of meiosis, giving the number of chromosomes per cell and the number of DNA molecules per cell for a cell that begins with 4 chromosomes (two homologous pairs) in G1. Include the following stages in your table: G1, S, G2, prophase I, metaphase I, anaphase I, telophase I (after cytokinesis), prophase II, metaphase II, anaphase II, and telophase II (after cytokinesis).

In metaphase I of meiosis, the homologous chromosomes of a cell lined up as shown below. Part 1 Select all the possible gametes if this cell suffered from nondisjunction of the smaller chromosome in meiosis I (meiosis II normal). Assume no crossing-over. a A A a a XX b b BB ABb O A ab O Ab aBB

Consider a diploid organism in which the somatic cell chromosome number is 42. Assume cytokinesis to occur in mid telophase. A. How many chromosomes at the close of telophase of mitosis? B. How many chromosomes are expected at metaphase II of meiosis?

Overall, meiosis and mitosis are analogous processes involving many of the same proteins. However, some proteins function uniquely in each of these cell-division events. Explain the meiosis-specific function of the following: (a) Ime2, (b) Rec8, (c) monopolin.

Non-disjunction of chromosome 21 during meiosis one followed by fertilization can result in all of the following except 2n-1 2n+1 3n 2n

In Human Cell at Difference Stages of MeloSIS Identify the number of chromosomes in a typical human GERM cell during each stage of meiosis. For each stage, choose either 23 or 46 chromosomes. Prophase I [Choose ] [Choose ] 23 Metaphase I 46 Anaphase I [ Choose ] Telophase I [ Choose ] Prophase II Choose ] Metaphase I [Choose] Anaphase II. [Choose ] Telophase II (Choose)