- 1(current)
Q. No.Concerning mammalian reproduction, which of the following is FALSE?
| 1. | Fertilisation involves the fusion of two gametes. |
| 2. | Reproduction is sexual and the offspring display genetic variation. |
| 3. | Reproduction relies upon the exchange of genetic material. |
| 4. | Mammalian gametes are diploid cells produced via meiosis. |
Subtopic: Â Cell Cycle: Meiosis I |Â Cell Cycle: Meiosis II |
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The process that increases the genetic variability in the population of organisms from one generation to the next is:
| 1. | Synthesis of extra DNA during S phase of cell cycle |
| 2. | Pairing of homologous chromosomes |
| 3. | Recombination of genetic material during meiosis |
| 4. | Changes in chromosomes after disintegration of nuclear membrane |
Subtopic: Â Cell Cycle: Meiosis I |Â Cell Cycle: Meiosis II |
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Level 1: 80%+
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Which of the following events is unique to meiosis I and does not occur in meiosis II?
| 1. | Pairing of homologous chromosomes and formation of bivalents. |
| 2. | Alignment of chromosomes at the metaphase plate. |
| 3. | Separation of sister chromatids. |
| 4. | Formation of spindle fibres. |
Subtopic: Â Cell Cycle: Meiosis I |Â Cell Cycle: Meiosis II |
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Regarding meiosis and mitosis, one difference between the two forms of cellular reproduction is that in meiosis:
| 1. | there is one round of cell division, whereas in mitosis there are two rounds of cell division. |
| 2. | separation of sister chromatids occurs during the second division, whereas in mitosis separation of sister chromatids occurs during the first division. |
| 3. | Chromosomes are replicated during interphase, whereas in mitosis, chromosomes are replicated during the first phase of mitosis. |
| 4. | Spindle fibers form during interphase, whereas in mitosis, the spindle fibers form during prophase. |
Subtopic: Â Cell Division: Mitosis (Karyokinesis) |Â Cell Cycle: Meiosis II |
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Meiosis results in a change in chromosomal number as shown by
1. 2n to 2n.
2. 2n to n.
3. n to 2n.
4. n to n.
1. 2n to 2n.
2. 2n to n.
3. n to 2n.
4. n to n.
Subtopic: Â Cell Cycle: Meiosis I |Â Cell Cycle: Meiosis II |
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Level 1: 80%+
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