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The first growth phase of the cell cycle after mitosis and before S phase.
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The period of interphase in which DNA is replicated.
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The second growth phase that follows S phase and precedes mitosis.
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| How much genetic material is present in a cell during meiosis prophase I compared with a cell that just completed meiosis? |
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| When a cell divides, genetic material is duplicated during? |
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| Starting with a fertilized egg, a series of five cell divisions would produce an embryo with how many cells? |
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| Alternate forms of a gene. |
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| What is the expected genotypic ratio of seed color for the offspring of an F1 x F1 cross? |
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| Which of these crosses will only produce heterozygous offspring? |
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| An individual with curly hair & an individual with straight hair mate & all of the offspring have wavy hair. What is the relationship between the alleles for hair texture? |
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| A plant with purple flowers is allowed to self-pollinate..it always producing purple flowers is an example of.. |
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| A karyotype would be unable to determine… |
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| A sexually reproducing animal has 2 unlinked genes; one for head shape & one for tail length. Its genotype is HhTt. Which of the following is possible in a gamete from this organism? |
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All of the genes controlling the traits behaved as if they were on different chromosomes.
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| The fact that all 7 of the pea plant traits studied by Mendel obeyed the Principle of Independent Assortment means that… |
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| In snapdragons, heterozygotes have pink flowers, whereas homozygotes have red or white. What proportion will be pink when red & white are mixed? |
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| What nuclear structure serves as a biological clock for cellular aging? |
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| A repeating sugar-phosphate-sugar-phosphate pattern. |
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| The backbone of DNA consists of… |
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| In a DNA double-helix, adenine pairs with ______, guanine pairs with ______. |
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| Each new DNA double-helix contains 1 new & 1 old strand. |
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| The transfer of genetic information from DNA to RNA is called… |
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| Short RNA fragments hybridize with mRNA and stimulate message degradation. |
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How does RNAi exert its effects on gene expression? |
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| In prokaryotes, a group of genes with relation functions along with their associated control sequences define… |
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Prevents lactose from utilizing enzymes.
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| The lac operon in e. coli.. |
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| What permits a gene to code for more than one polypeptide? |
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| One or more somatic mutations must occur at each stage. |
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| The development of colorectal cancer occurs in stages because… |
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| It results in a DNA strand that lacks introns. |
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| The advantage of using reverse transcriptase to prepare a gene for cloning is.. |
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| The 2nd most deadly cancer in the US (both men & women) is… |
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| To stop the bleeding by forming blood clots |
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| What is the primary role of blood platelets? |
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| What stimulates the production of antibodies that they might bind to a foreign substance? |
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| Prion diseases are caused by… |
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| blue granules, histamines |
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| The Basophil cells (___) release inflammatory factors (___) that enhance allergic reactions. |
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Many viruses are able to rapidly change their surface antigens.
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| Joe had a flu shot two years ago, but not this year. He got the flu. Why wasn’t he immune for more than one year? |
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| Because the cells bind to & inhibit the tumor suppressor genes. |
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| Why does HPV cause cervical cancer? |
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| What type of tissue is this? (striated) |
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| What type of tissue is this? (long cords bound together) |
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| Which has radial-symmetry? |
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Healthy genes into the cells that lack them.
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| Gene therapy includes introducing.. |
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| Species are fixed (permanent), they do not evolve. |
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| What did Aristotle believe? |
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| They may still be endangered, because there is little gene variation. |
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| Certain whale species have been hunted to near extinction, but since then the sizes have expanded. Which is true? |
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| Which parasitic infection is a leading cause of death worldwide? |
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| What are found in bacterial, but not eukaryotic cells? |
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| Gas exchange in sponges is by… |
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| Dispersive (mobile) stage of the cnidarium life cycle is… |
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| You see a round, white translucent mass “bobbing” on the ocean’s surface..what is it? |
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| Tapeworms attach to digestive lining by… |
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| The parasitic roundworm that affects 25% of the population is..? |
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| Transcription of DNA proceeds in which direction? |
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| Which is not a cell surface receptor? |
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| " The dog did not eat " which would be a frame shift mutation? |
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| The coding regions of a gene (in a polypeptide sequence) are called |
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| A gene involved in a precancer developement. |
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| What is a photo-oncogene? |
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| supress photo-oncogene expressed in normal tissues. |
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| Which is NOT a function of a tumor supressor gene? |
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Repetitive short sequences of DNA found at the end of each chromosomes.
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| The exchange of gases between interestrial fluid and the blood occurrs in the |
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| The most numerous blood-cell is |
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| Which is secreted by IgE immune complex with activate basophils and tissue mass cells causing an allergetic response? |
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| transports O2 from the lungs to tissues |
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| The little cells (in picture).. |
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| the phagocytic white cell that appears first at sites of infection or tissue injury. |
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| The big cell with 3-chunks in the middle |
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| Embyonic Stem cells are called pluripotent because each cell is capable of developing into |
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| Who developed a theory nearly identicle to Darwins? |
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| Genetic drift resulting from disaster that drastically reduces pupulation is |
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| What resembled chloroplasts in stem cells? |
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