A drawing of a cell in G2 interphase is provided. The cell contains 4 replicated chromosomes with alleles (H, h, F, f) properly labeled. A set of sister chromotids is labeled.
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- A drawing of a cell in anaphase is provided. The cell contains 8 unreplicated chromosomes with alleles (H, h, F, f) properly labeled. The chromosomes are shown separating from each other with 4 chromosomes moving toward each side of the cell. Spindle fibers are labeled.A somatic cell has the genotype DdEe. All chromosomes in this organism are metacentric. Show metaphase and the results of mitosis if the D and E locus are linked on the same chromosome in trans configuration. A sexually reproducing organism has the following phenotype DdEeAaTt: The D and E loci are on the same arm of a metacentric chromosome in cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. 2.1. What is the haploid number of this organism? 2.2. Using diagrams show a ceii at metaphase of mitosis and show the results of mitosis.A sexually reproducing organism has the following phenotype DdEeAaTt. The D and E loci are on the same arm of a metacentric chromosome in the cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. There are no other chromosomes. Show a diagram of the cell in metaphase of mitosis and the result of mitosis.
- consider a diploid cell that contains three pairs of chromosomes designated AA, BB, and CC. Each pair contains a maternal and a paternal member (e.g., Am and Ap, etc.). Using these designations, demonstrate your understanding of mitosis and meiosis by drawing chromatid combinations as requested. Be sure to indicate when chromatids are paired as a result of replication and/or synapsis. You may wish to use a large piece of brown manila wrapping paper or a large cut-up paper bag and work with another student as you deal with these problems. Such cooperative learning may be a useful approach as you solve problems throughout the text. Draw all possible combinations of chromatids during anaphase II in meiosis.Mitotic nondisjunction can occur, particularly in tumor cells. Assume a single nondisjunction event involving the X chromosome occurs in a cell undergoing mitosis in a human female. First, consider the daughter cell with the smaller number of chromosomes: How many total chromosomes will this cell have? How many X chromosomes will this cell have? Next, consider the daughter cell with the larger number of chromosomes: How many total chromosomes will this cell have? How many X chromosomes will this cell have?Select true or false for each of the following statements regarding anaphase II. Sister chromatids remain attached at the centromeres. Answertruefalse Homologous chromosomes remain attached at the centromeres. Answertruefalse Sister chromatids are pulled apart. Answertruefalse Homologous chromosomes are pulled apart. Answertruefalse Chiasmata are broken. Answertruefalse Non-kinetochore microtubules lengthen the cell. Answertruefalse
- Diploid somatic cells of elephants have 56 chromosomes. If nondisjunction of one of a male elephant’s chromosomes occurs in meiosis II, at the end of meiosis the four resulting sperm are expected to have the chromosome complement: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. F G N R A B D e g a B d E 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 independent assortment. Give the alleles of each gamete contained within a set of brackets. You may assume that no crossing over would take place.illustrate and briefly describe the alignment, pairing, and disjunction ofsister chromatids during mitosis. Include the molecular complexes cohesin and shugoshin and the enzyme separase.
- For an organism with 3 pairs of chromosomes (6 total chromosomes, 2n = 6), draw chromosome diagrams for the following phases of the mitotic cell cycle: G1 of interphase, prophase, metaphase, anaphase & telophase. Be sure to draw the correct number of chromosomes and the correct number of chromatids per chromosome. Use a different color to represent each chromosome type (for example, use blue to indicate all copies of chromosome 1, red for all copies of chromosome 2, & green for all copies of chromosome 3).Draw and label a 2n=4 cell going through anaphase of mitosis.3 6 points A diploid cell in G1 of interphase has eight chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages? Complete the table below. Anaphase II G1 of interphase G2 of interphase- Telophase 1 (after cytokinesis) Anaphase I S 8 chromosomes/cell and 8 DNA molecules/cell 8 chromosomes/cell and 16 DNA molecules/cell 8 chromosomes/cell and 8 DNA molecules/cell 8 chromosomes/cell and 16 DNA molecules/cell 8 chromosomes/cell and 16 DNA molecules/cell Prophase II Telophase II (after cytokinesis) Metaphase I Metaphase II 8 chromosomes/cell and 16 DNA molecules/cell 4 chromosomes/cell and 8 DNA molecules/cell
