 |
| 1 | |
In 1882, Pierre-Joseph van Beneden was surprised to find the same number of chromosomes in all cells of the roundworm Ascaris. |
| | A) | True |
| | B) | False |
|
|
|
| 2 | |
A ________ cell contains two versions of each chromosome. |
| | A) | diploid |
| | B) | haploid |
| | C) | sperm |
| | D) | egg |
|
|
|
| 3 | |
An organism reproduces either sexually or asexually, but not both. |
| | A) | True |
| | B) | False |
|
|
|
| 4 | |
In the sexual life cycle, there is an alternation of diploid and haploid phases. |
| | A) | True |
| | B) | False |
|
|
|
| 5 | |
_____________ cells are genetically identical to the zygote from which they originated. |
| | A) | Somatic |
| | B) | Germ-line |
| | C) | Body |
| | D) | All of the above |
|
|
|
| 6 | |
In animals, the completion of meiosis is followed soon by |
| | A) | mitosis. |
| | B) | fertilization. |
| | C) | asexual reproduction. |
| | D) | All of the above |
|
|
|
| 7 | |
Before the beginning of either meiosis or mitosis, the chromosomes have replicated during |
| | A) | Interphase. |
| | B) | prophase I. |
| | C) | metaphase I. |
| | D) | anaphase I. |
| | E) | telophase I. |
|
|
|
| 8 | |
During ___________, the homologous chromosomes line up side by side, physically touching one another at which point crossing over is initiated. |
| | A) | interphase |
| | B) | prophase I |
| | C) | metaphase I |
| | D) | anaphase I |
| | E) | telophase I |
|
|
|
| 9 | |
During ____________, the random orientation of the chromosomes results in a shuffling of the chromosomes so that each daughter cell that results has a different combination of parental chromosomes. |
| | A) | interphase |
| | B) | prophase I |
| | C) | metaphase I |
| | D) | anaphase I |
| | E) | telophase I |
|
|
|
| 10 | |
Meiosis II is simply a mitotic division involving the products of meiosis I, except that the sister chromatids are not genetically identical as they are in mitosis. |
| | A) | True |
| | B) | False |
|
|
|
| 11 | |
The main outcome of the four stages of meiosis II: prophase II, metaphase II, anaphase II, and telophase II-is to separate |
| | A) | sister chromosomes. |
| | B) | homologous chromatids. |
| | C) | sister chromatids. |
| | D) | homologous chromosomes. |
|
|
|
| 12 | |
At the end of meiosis II, each of the each of the haploid cells contains ________ of every chromosome in the set. |
| | A) | one |
| | B) | two |
| | C) | 23 |
| | D) | 46 |
|
|
|
| 13 | |
__________________ draws homologous chromosomes together all along their lengths creating an opportunity where two homologues can physically exchange portions of themselves. |
| | A) | Crossing over |
| | B) | Independent assortment |
| | C) | Synapsis |
| | D) | All of the above |
|
|
|
| 14 | |
Reduction division produces diploid gametes, thus ensuring that the chromosome number remains the same as the parents, following fertilization. |
| | A) | True |
| | B) | False |
|
|
|
| 15 | |
Both mitosis and meiosis start with a diploid cell, but the end result is haploid cells in meiosis and diploid cells in mitosis. |
| | A) | True |
| | B) | False |
|
|
|
| 16 | |
In most respects, ____________ is identical to a normal mitotic division. |
| | A) | the first meiotic division |
| | B) | the second meiotic division |
| | C) | interphase I |
| | D) | interphase II |
| | E) | All of the above |
|
|
|
| 17 | |
Sexual reproduction increases genetic variability through |
| | A) | independent assortment. |
| | B) | crossing over. |
| | C) | random fertilization. |
| | D) | All of the above |
|
|
|
| 18 | |
In humans there are more than eight million different possible kinds of gametes that can be produced. |
| | A) | True |
| | B) | False |
|
|
|
| 19 | |
Reproduction that involves the alternation of meiosis and fertilization is called asexual reproduction. |
| | A) | True |
| | B) | False |
|
|
|
| 20 | |
Binary fission of prokaryotes is an example of sexual reproduction. |
| | A) | True |
| | B) | False |
|
|
.