Lion has 38 chromosomes in total (2n = 38). During reproduction, the sperm of Lion will have _______ numbers of chromosomes. a. 76 b. 152 c. 19 d. 38

___i___ sex chromosome is present in male Drosophila and ___ii___ sex chromosome is found in female Drosophila. This statement is completed by the information in row ______.   Row i ii A. XY XX B. XX XO C. XO XX D. XX XY

appear during various stages of either mitosis or meiosis, and answer the following questions. 45. Refer to the drawings in Figure 13.2 of a single pair of homologous chromosomes as they might II II IV VI Figure 13.2 Which diagram represents prophase I of meiosis? a. b. v II d. IV e. VI c. 46. If a cell does not receive a go ahead signal at the Gl checkpoint in the cell cycle then it will a. proceed on to the "S" phase b. go directly to jail c. proceed to mitosis d. enter a nondividing state called the Go phase DO not pass GO. DO not collect $200 47. When T2 phages infect bacteria and make more viruses in the presence of radioactive phosphorus, what is the result? The bacterial DNA will be radioactive. The viral DNA will be radioactive. The boacterial DNA will be radioactive. The viral DNA will be radioactive. The viral proteins will be radioactive. b. c. The viral DNA will be radioactive. d. e. The viral proteins will be radioactive. 48. Each amino acid attaches to its proper tRNA…

The chromosome count of a cell at the beginning of prophase I is 12. What is the centromere count in a gamete belonging to the same organism?   A. 48   B. 24   C. 6   D. 12   E. None of the answers are correct