Term
| What is chromosome number? |
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Definition
| Number of chromosomes in a cell |
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Term
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Definition
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Term
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Definition
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Term
| What are sister chromatids? |
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Definition
| Two chromatids coming from the same chromosomes |
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Term
| What are homologous chromosome? |
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Definition
| Two nonsister chromatids in a homologous pair |
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Term
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Definition
A process involving two consecutive nuclear divisions that reduce the chromosome number in half.
Meiosis 1
Meiosis 2 |
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Term
| In meiosis, how many chromosomes do humans go to? |
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Definition
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Term
| What does meiosis result in? |
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Definition
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Term
| What are the resultant cells that occur because of meiosis? |
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Definition
Gametes
Human:sperm and egg |
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Term
| How are full chromosome numbers in Meiosis restored? |
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Definition
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Term
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Definition
| Diploid cell resulting from fertilization |
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Term
| Where do chromosomes duplicate? |
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Definition
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Term
| Where do the two nuclear divisions occur in Meiosis? |
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Definition
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Term
| What occurs in Meiosis I? |
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Definition
| Homologous chromosome separate |
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Term
| What occurs in Meiosis II? |
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Definition
| Sister chromatids separate |
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Term
| What are the stages of meiosis I? |
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Definition
Prophase 1
Metaphase 1
Anaphase 1
Telophase 1 |
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Term
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Definition
Synapsis-physical pairing of homologous chromosomes
Crossing over-exchange of portions of non-sister chromatids(formation of chiasmata,provides generic variation, ensures chromosome segregation) |
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Term
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Definition
Chromosomes align at metaphase plate
Assort randomly |
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Term
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Definition
| Homologous chromosome pairs separate |
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Term
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Definition
| Chromosomes need not condense |
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Term
| What are the stages of meiosis II? |
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Definition
Prophase II
Metaphase II
Anaphase II
Telophase II |
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Term
| What are the differences between meiosis and mitosis? |
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Definition
Mitosis produces identical copies of parent cells - asexual reproduction, growth,renewal and repair
Meiosis produces gametes with genetic variation-sexual reproduction |
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Term
| Describe the generic variation in Meiosis |
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Definition
Crossing over is in prophase I
Independent assortment is in metaphase I
Random fertilization of gametes |
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Term
| Describe cell division in fungi |
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Definition
Many do not perform full cytokinesis after mitosis
Share cytoplasm
Mitosis
Meiosis I
Meiosis II
Maturation |
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Term
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Definition
| Human sperm do not undergo full cytokinesis throughout most of their development |
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Term
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Definition
Human eggs undergo asymmetric cytokinesis during methods with two signification pauses
Prophase I
Meiotic arrest (until puberty)
Meiosis I resumes (start of cycle)
Meiosis II begins (ovulation)
Meiotic arrest in Metaphase II
Meiosis II resumes (fertilization) |
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Term
| What are the two pauses in oogenesis? |
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Definition
Meiosis arrest in prophase I
Meiosis arrest in metaphase II |
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