41. A DNA molecule is a polymer made of subunits called
(a) bases. (b) amino acids.
(c) nucleotides. (d) nucleic acids.
42. A human somatic cell contains _____ chromosomes.
(a) 23 (b) 47
(c) 2n (d) 46
43. Which of the following is a normal human female?
(a) X Y (b) X X Y
(c) X X (d) X
44. A karyotype would be least likely to show which of the following?
(a) an extra chromosome
(b) part of a chromosome duplicated
(d) a missing chromosome
(d) part of a chromosome turned around
45. The diploid stage of a plant that exhibits an alternation of generation is the
(a) antheridium. (b) gametophyte.
(c) spore. (d) sporophyte.
46. DNA replication occurs
(a) whenever a cell makes protein.
(b) to repair gene damage caused by mutation.
(c) before a cell divides.
(d) whenever a cell needs RNA.
47. Mitosis and cytokinesis result in the formation of ______; meiosis and cytokinesis result in the formation of ________.
(a) 4 diploid cells; 4 haploid cells
(b) 2 diploid cells; 2 haploid cells
(c) 2 diploid cells; 4 haploid cells
(d) 2 diploid cells; 2 diploid cells.
48. Which of the following occurs during meiosis but not during mitosis?
(a) Chromosomes align at the metaphase plate.
(b) Chromosomes condense.
(c) Chromosomes migrate to opposite poles.
(d) synapsis
49. At the end of telophase I and cytokinesis there are
(a) 4 haploid cells. (b) 2 diploid cells.
(c) 1 haploid ovum and 3 polar bodies. (d) 2 haploid cells.
50. Synapsis occurs during
(a) anaphase I. (b) prophase I.
(c) cytokinesis. (d) prophase II.
Check Your Answer
(a) bases. (b) amino acids.
(c) nucleotides. (d) nucleic acids.
42. A human somatic cell contains _____ chromosomes.
(a) 23 (b) 47
(c) 2n (d) 46
43. Which of the following is a normal human female?
(a) X Y (b) X X Y
(c) X X (d) X
44. A karyotype would be least likely to show which of the following?
(a) an extra chromosome
(b) part of a chromosome duplicated
(d) a missing chromosome
(d) part of a chromosome turned around
45. The diploid stage of a plant that exhibits an alternation of generation is the
(a) antheridium. (b) gametophyte.
(c) spore. (d) sporophyte.
46. DNA replication occurs
(a) whenever a cell makes protein.
(b) to repair gene damage caused by mutation.
(c) before a cell divides.
(d) whenever a cell needs RNA.
47. Mitosis and cytokinesis result in the formation of ______; meiosis and cytokinesis result in the formation of ________.
(a) 4 diploid cells; 4 haploid cells
(b) 2 diploid cells; 2 haploid cells
(c) 2 diploid cells; 4 haploid cells
(d) 2 diploid cells; 2 diploid cells.
48. Which of the following occurs during meiosis but not during mitosis?
(a) Chromosomes align at the metaphase plate.
(b) Chromosomes condense.
(c) Chromosomes migrate to opposite poles.
(d) synapsis
49. At the end of telophase I and cytokinesis there are
(a) 4 haploid cells. (b) 2 diploid cells.
(c) 1 haploid ovum and 3 polar bodies. (d) 2 haploid cells.
50. Synapsis occurs during
(a) anaphase I. (b) prophase I.
(c) cytokinesis. (d) prophase II.
Check Your Answer
