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35 Cards in this Set
- Front
- Back
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In order to fit w/in the cell, DNA becomes more compact by wrapping around proteins called__________? |
C. Histones |
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Duplicate halves of a single chromosomes are called___________? |
C. Chromatids |
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A protein disk that attaches to chromatids to each other in a chromosome is called a__________? |
B. Centromere |
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The chromosomes in your body cells__________________________. |
D. (all of these) are found in 23 pairs, have 2 sex chromosomes, and include 44 autosomes. |
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A student can study a karyotype to learn about the_________________. |
D. number of chromosomes in a cell. |
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A diploid cell is one that__________________. |
D. has twice the haploid number is designated by the symbol 2n and has chromosomes found in pairs. |
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How many chromosomes are in a skin cell if the haploid number of chromosomes in an egg cell is 42? |
E. 84 |
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How many chromosomes are in the gametes of an organism that has a diploid number of 16? |
B. 8 |
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Binary fission occurs in_______________. |
D. Prokaryotic cell, bacteria, and in 20 minutes. |
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The chromosomes of a bacterium__________________________. |
B. has a circular loop shape. |
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The stage of the cell cycle that occupies more than 90% of a cells life is in_________________. |
D. interphase. |
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What shows the correct sequence of the cell cycle? |
D. G1--> S--> G2--> M--> C |
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The phase of mitosis is characterized by chromosomes separating and migrating from the equator is______________. |
C. Anaphase |
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A spindle fiber is specialized form of_____________ that guides chromosomes during mitosis. |
A. Microtubule. |
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Phase 3 in mitosis is_____________. |
A. metaphase. |
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What is the first stage of mitosis? |
D. Prophase. |
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What is the fourth stage in mitosis? |
B. Telophase. |
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If a cell contains 96 chromosomes before meiosis, after meiosis each cell will contain__________ chromosomes. |
A. 48 |
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Crossing-over results in genetic___________. |
D. (All of the above) recombination, variation, and diversity. |
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The exchange of DNA segments between members of a pair of chromosomes during prophase I___________________. |
B. acts as a source of genetic variation within a species. |
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In humans, gametes each contribute 23 chromosomes resulting in a zygote with_______________ chromosomes. |
B. 46 |
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If a body cell contains 72 pairs of chromosomes, the gametes contain__________ chromosomes. |
D. 72 UNPAIRED. |
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A karyotype of a mouse shows that it has an x and a y chromosome. The mouse is____________. |
D. male. |
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We observed onion root tip cells during mitosis. However, most of the cells were NOT in mitosis and were in__________. |
D. interphase. |
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During human oogenisis, if chromosome #21 fails to separate, when fertilized, this may result in_______________. |
D. interphase. |
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A term that represents the production of haploid gametes is____________. |
D. (All of the above) spermatogenisis, oogenisis, and meiosis. |
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If you observe 15 bacteria cells reproducing, how many bacteria cells will be there after 4 hours? |
E. 61, 440. |
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The function of gamete production in organisms allows them to reproduce_____________________. |
D. (All of the above) diploid offspring, sexually, and genetic variation. |
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The process of _____________ is a major topic of study in Chapter 8. |
D. (All of the above) meiosis, mitosis, and the cel cycle. |
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____________ reproduction provides the greatest genetic advantage to the future survival of any species. |
B. Sexual |
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In our lab activity, we observed stages of________ in an onion root tip. |
A. mitosis. |
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An important reason for cell division is so that cells can more efficiently maintain____________. |
A. homeostasis. |
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If an organism has 76 chromosomes, how many autosomes will it have? |
C. 74. |
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A, A(n)____________cell has only one single copy of each chromosome. |
E. (All of the above) gamete, haploid, egg, and sperm. |
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When a 2n cell grows too large, it can reduce its size, while remaining diploid through______________. |
D. mitosis |
