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True/False
Indicate whether the sentence or statement is true or false.
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1. |
The information needed by a cell to direct its activities and to determine its characteristics is contained in molecules of deoxyribonucleic acid (DNA).
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2. |
Gametes are diploid so that when fertilization occurs, the resulting zygote will have the characteristic number of chromosomes for that species.
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3. |
A karyotype is a type of gene.
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4. |
Cell division in bacteria and eukaryotes takes place in precisely the same manner.
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5. |
Cells spend most of their lifetime in interphase.
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6. |
After the replication of a cell’s chromatids, there are twice as many centromeres as there are chromosomes.
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7. |
Asexual reproduction occurs by mitosis.
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8. |
During telophase, a nuclear envelope surrounds each new set of chromosomes.
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9. |
Chromatids separate from each other during telophase.
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10. |
After mitosis and cytokinesis, each new cell has a complete set of the original cell’s chromosomes.
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Completion
Complete each sentence or statement.
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11. |
Following replication of its DNA, each chromosome contains two ____________________, which are attached to each other by a centromere.
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12. |
Chromosomes that are not involved in sex determination are called ____________________.
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13. |
A picture of a cell’s chromosomes is called a ____________________.
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14. |
The sequence of events that occurs in a cell from one mitotic division to the next is called the ____________________.
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15. |
“Cables” made of microtubules that extend from the poles of a cell to the centromeres during cell division are called ____________________.
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16. |
In mitosis, anaphase follows ____________________.
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17. |
The stage of meiosis during which homologues line up along the equator of the cell is called ____________________.
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18. |
The process called ____________________ guarantees that the number of chromosomes in gametes is half the number of chromosomes in body cells.
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19. |
A reciprocal exchange of corresponding segments of DNA is called ____________________.
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20. |
As a result of spermatogenesis, ____________________ cells are produced that can all develop into sperm cells. As a result of oogenesis, only ____________________ cell(s) develop(s) into (an) egg cell(s).
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