2. Below is a diagram of both homologs of chromosome 1 in a cell that is about the undergo DNA replication and meiosis. This cell has two different alleles of gene B, giving it the genotype Bb, as shown below. Each line represents one double-stranded DNA molecule. t A. Which of the following sets of diagrams accurately represents the same chromosomes after DNA replication, and before anything else happens? Choose one. a. B+ b b. oto oto b b со внь ьав C. During meiosis I in this cell, only one chiasma forms on chromosome 1. The chiasma is located on the short arm of the chromosome. Draw a diagram of both of the two cells that result from meiosis I, showing chromosome 1, and alleles o D. The same original cell also has two different alleles of gene E, E and e. Gene E is located on a different chromosome, Chromosome 3. Considering both genes B and E, what are all the possible gamete genotypes that could result from this meiosis? List them here.

1.In a cell culture you are tracking cell division and DNA replication. You start with 100 cells, and let the cells divide two rounds with fluorescent nucleotides present in the media, instead of normal nucleotides. This allows for the visualization of the DNA under a fluorescence microscope. After two rounds of division, you remove the fluorescent nucleotides, and let the cells divide one more round.  How many NON-fluorescently labeled cells do you expect to find? Select one: a.800 b.100 c.400 d.0 e.200   2.  Which of the following are protein - RNA complexes? a.Polymerase b.Ribosome c.aminoacyl trna synthetase d.Spliceosome

4. The structures within living cells that contain the genetic material is called   A Chromosome   B. Nucleosome   C. Ribosome   D. Nucleolus

21. If the original sequence of chromosome is L M NO P Q R S and two chromosome mutation occurs, resulting in sequence of L N MOPR S, what type of mutation is it? A. Two translocation B. Two inversion C. Two deletion D. One inversion and one deletion 22. In humans, free ear lobe is dominant to attached ear lobe while curly hair is dominant to straight hair. If husband and wife are double heterozygous, what is the chance of their children having free ear lobes and straight hair? A. 1/16 В. 2/16 С. 3/16 D. 9/16 Page 8 of 23 Cell Biology BIO30305 Dr. Ng Woei Kean 202104 FE 23. The followings are chemical factors that cause mutation EXCEPT A. base analog B. acid reagent C. acridine derivative D. deaminating agent