Term
| What is the difference between chromatids and chromatin? |
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Definition
Chromatid: two identical parts of a chromosome
Chromatin: the loose combination fo DNA and proteins |
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Term
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Definition
| the ends of DNA molecules which are made of repeating nucleotides that do not form genes |
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Term
What does this mean: 47, XX, +21?
What syndrome is it most likely to be?
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Definition
Down Syndrome
47: there are 47 chromosomes
XX: its a girl
+21: there is an extra chromosome at chromosome pair 21 |
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Term
Analogy:
Somatic is to diploid is to mitosis as .... is to .... is to ....? |
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Definition
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Term
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Definition
| protein that organizes chromosomes and around which DNA wraps |
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Term
| Why does DNA coil and compact into chromatin? |
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Definition
1. because of the interaction between histones in the chromatin
2. makes cell division possible |
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Term
| What happens in the G1 stage? S stage? G2 stage? |
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Definition
G1: cells grow, carry out normal functions, and replicate ther organelles
S: DNA replication
G2: additional growth |
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Term
| What organelle helps separate the chromosomes? |
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Definition
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Term
| What is the big difference between metaphase in mitosis and metaphase I in meiosis? |
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Definition
[image]Metaphase in mitosis has the chromosomes line up along the equator and metaphase I in meiosis has the homologous chromosomes line up next to each other.
[image] |
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Term
| How is telophase completed in plant cells? |
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Definition
| cell plate forms between two nuclei |
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Term
| How are prophase and telophase similar? |
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Definition
| Both prophase and telophase have a complete set of chromosomes and organelles. |
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Term
Fill in the Blank:
Meiosis is the from of nuclear division that creates .......... cells from .......... cell. |
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Definition
| four haploid, one diploid |
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Term
| What is the production fo gametes called? |
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Definition
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Term
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Definition
| cells with little more than DNA that areevery eventually broken down |
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Term
| Meiosis I divides ______ while meiosis II divides _______. |
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Definition
| homologous chromosomes, sister chromatids |
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Term
| What step does metaphase I have but metaphase II doesn't? |
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Definition
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Term
| What is the production of egg cell? |
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Definition
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Term
| What happens in meiosis I of oogenesis? meiosis II? |
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Definition
meiosis I: cytoplasm is distributed unequally
meiosis II: 1 egg cell matures, and 3 "polar bodies" die :( |
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