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Module 4-BSC2010L
BSC2010L- Cell cycle, Mitosis, Meiosis and patterns of inheritance
| Question | Answer |
|---|---|
| Gap 1 | The cell grows |
| Chromosomes replicate | Synthesis |
| The cell prepares for mitosis | Gap 2 |
| Sister chromatids attach at the centromere | Prophase |
| Nuclear membrane fully dissociates | Prometaphase |
| Chromosomes align in the center of the cell | Metaphase |
| Sister chromatids separate | Anaphase |
| Chromosomes decondense | Telophase |
| Human body cells typically have 46 chromosomes. After the “S” phase of interphase, what is the total number of chromatids that would be present? | 92 |
| Human body cells typically have 46 chromosomes. After mitosis, what is the number of chromosomes that would be present in each cell? | 46 |
| What has happened to the amount of genetic material in a cell after the S phase of interphase? | It has doubled. |
| Your lab partner is examining an onion mitosis slide through the light microscope. She is looking for chromosomes in a cell that is in interphase, but is frustrated that she cannot see individual chromosomes in her slide. What should you tell her? | Chromosomes are not visible in interphase using a light microscope. |
| In a typical cell cycle, what amount of time is spent in mitosis? | 5-10% |
| What do plant cells form to aid cytokinesis? | Cell plate |
| Which organelle associated with spindle formation is lacking in plant cells but is present in animal cells? | Centriole |
| How is mitosis related to cancer? | Cancer is uncontrolled mitosis. |
| What is the human diploid number? | 46 |
| How does one human chromosome differ from another human chromosome? | Length, Position of centromere, Genetic information within |
| What is the difference between homologous chromosomes and chromatids? | Homologous chromosomes may carry different alleles. |
| A hypothetical prescription drug has been found to reduce the rate of mitosis by half. What would be the consequences of this reduction? | The wound healing time of that tissue would increase. |
| What would occur if chromosomes did not line up in single file during metaphase? | Chromosomes may not separate properly during anaphase. |
| In which types of cells does meiosis occur? Check all that apply. | cells that form sperm, cells that form eggs |
| Which is true about the chromosome content of gametes? | It is half that of normal body cells. |
| Homologous chromosomes are identical in every way. | False |
| Which events happen in meiosis that do not occur in mitosis? Check all that apply. | Crossover occurs, Homologous chromosomes line up in pairs at the equatorial plate |
| An alternate form of a gene is an ______. | Allele |
| What event happens only in prophase 1? | Crossing over |
| What event happens only in prophase 1? | Homologous pairs separate in anaphase 1. |
| Homologues synapse | Prophase 1 |
| Bivalents attach to the kinetochore | Prometaphase 1 |
| Bivalents are aligned in the center of the cell | Metaphase 1 |
| Homologues separate | Anaphase 1 |
| Nuclear membranes re-form around 2 haploid nuclei | Telophase 1 |
| Chromosomes condense in 2 haploid nuclei | Prophase 2 |
| Nuclear membrane dissociates around 2 haploid nuclei | Prometaphase 2 |
| Individual homologues align in the center of the cell | Metaphase 2 |
| Sister chromatids separate | Anaphase 2 |
| Nuclear membranes re-form around 4 haploid nuclei | Telophase 2 |
| If a cell has 8 bivalents, how many chromatids are present? | 32 |
| Dogs have 39 chromosomes in their gametes. How many chromosomes should they have in their normal body cells? | 78 |
| If crossing over occurred in one cell and not another, how would the two cells compare? | Crossing over would increase the genetic diversity in one of the cells. |
| Imagine that a mutation occurs so that kinetochores do not form. Predict what would happen to a cell with this mutation. | Chromosomes would not move during meiosis. |
| Blood type A has | anti-B antibodies |
| Blood type B has | anti-A antibodies |
| Blood type O has | both anti-A and anti-B antibodies |
| Blood type AB has | neither anti-A or anti-b antibodies |
| Homologous chromosomes separate and move toward opposite poles of the cell during what phase of meiosis 1? | Anaphase 1 |
| At the end of meiosis how many daughter cells are produces? | 4 |
| In human females, germ-line cells that undergo meiosis are found in what organ? | Ovaries |
| The large circular structures in the micrograph are cross-sections of what coiled tubules in the human testes? | Semini ferrous tubules |
| In human males, meiosis occurring in the germ-line cells found in the _____ give rise to gametes called _________. | testes, sperm |
| Select all of the following that are functions of mitosis. | Growth and repair of body tissues, produce two daughter cells from one parent cell, produce daughter cells that are genetically indentical |
| Which of the following represents that correct order of the phases of mitosis? | Prophase, metaphase, anaphase, telophase |
| Select all of the following that are functions of meiosis | Shuffle the genetic material, produce gametes |
| What is true of daughter cells produced by meiosis? | They participate in sexual reproduction, They contain half the number of chromosomes as the parent cell |
| Which describes the cells at the end of meiosis 1? | They cells are haploid (chromatid are connected at the centromere the cell is a haploid because it has half the original chromosome #), The homologous chromosomes are in separate cells ( 2 HC and a Homologous pair have separated and moved to new cells) |
| The end of meiosis II produces | 4 haploid cells |
| If nondisjunction occurs during anaphase I then meiosis I produces | one cells with extra homologous chromosomes and one cell missing a homologous CHR |
| If nondisjunction occurs during anaphase I the final product of meiosis II is | two cells with an extra CHR and 2 cells missing a CHR |
| Which describes the cells at the end of meiosis when nondisjunction occurs during meiosis II? | The homologous pairs are in separate cells, the cells are haploid |
| At what phase can nondisjunction occur> | Anaphase I or II |
| What is the difference between meiosis I and meiosis II? | Meiosis I separates homologous CHR and meiosis II separates sister chromatids. |
| Which of the following are wild type characteristics of fruit flies? | Red eyes, long/flat/oval wings, light brown bodies |
| What is a monohybrid cross? | A monohybrid cross is a mating between organisms that have different alleles for a single gene of interest. |
| In the cross CC x cc what is the expected ratio of seedlings? | 4 green: 0 white |
| Why are adult flies in the XRY x XRXr vial incubated for 1 week? | one week is long enough for the flies to mate and lay eggs but not long enough for new flies to hatch. They live 40 days |
| Why are the adult flies in the XRy x XRXr vial removed? | the goal of the experiment is the count the phenotypic ratio of offspring: therefor the parental generation must be removed. |
| What is a dihybrid cross? | A dihybrid cross is the mating between organisms that have different alleles for 2 different genes of interest. |
Created by:
Jen2pen
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