u Uaugnter cens in mitosis 48) Which best describes the process of independent assortment? A) The way one pair of homologous chromosomes lines up along the metaphase plate does not affect how any other pair lines up B) Segregation of chromosomes during meiosis I is independent of their segregation during meiosis II C) During crossing over, chromosomes pair up at random D) Crossing over along one pair of chromosomes is independent of crossing over along the other pairs

4) What is occurring during the Anaphase stage of mitosis, such as is shown in the figure to the right? A) The DNA is being replicated. B) The homologous chromosomes are separating. C) Sister chromatids are being pulled to opposite poles. D) A cleavage furrow is forming to divide the cell. Inid parents made gametes using

In a diploid cell, two homologous chromosomes are: A) similar , but from two different species B) mirror images of each other C) similar, but from two different people D) identical to each other E) copies of each other

9) A diploid cell is preparing to undergo meiosis. Before the 'S' phase, the cell has 6 picograms (pg) of DNA in it. Answer the following: a) After the 'S' phase of the cell cycle what ploidy is the cell? How many picograms of DNA does it contain? b) After meiosis I, how many daughter cells are there total? What is the ploidy of each cell? How many picograms of DNA does each cell contain?

Consider the following two meiocytes in metaphase I, with crossover positions as indicated for cell A. Solid black lines indicate spindle microtubules. Assume blue chromosomes represents paternal chromosomes and green maternal chromosomes. G N D t d Cell A Cell B i) How many chromosomes and chromatids were present in cell A during the G1 phase? Please clearly specify chromosomes and chromatids in your answer. ii) For cell A, list all the gametes that will be produced from this cell. Give the alleles of each gamete contained within a set of brackets. You may ignore independent assortment. iii) For cell B, list all the gametes that will be produced from this cell given crossing over. Give the alleles of each gamete contained within a set of brackets. You may assume that no crossing over would take place.

What would be the number of chromosomes and chromatids for a cell (2n=4) in each phase (S-phase, Prophase, Metaphase, Anaphase and Telophase/Cytokinesis) of Meiosis I and II?

During metaphase I of meiosis, tetrads align along the metaphase plate independently of each other. Therefore, there is a random “shuffle” of maternal and paternal chromosomes in the resulting gametes.The following diagram demonstrates how this works in a diploid cell with four chromosomes . Because there are two pairs of chromosomes and each pair can align in one of two ways during metaphase I, the number of possible variations in the gametes produced is , or .For an organism that is , there are three pairs of chromosomes, so the number of possible variations in the gametes produced due to independent assortment in metaphase I is , or . 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

1/outline ¥ Question Completion Status: QUESTION 9 During metaphase II of meiosis, O pairs of homologues chromosomes line up in the centre O pair of sister chromatids line up at the centre O Chromosomes are divided into two O Chromosomes thicken QUESTION 10 Which of the following is one of the body's first lines of defense against infection? A) antibodies B) obstacles such as skin and mucous membranes C) increased production of certain hormones D) decreased heart rate O antibodies obstacles such as skin and mucous membranes O increased production of certain hormones O decreased heart rate Save Shmtto sae and submit: Click Save All Answers to save all answers.