nucleotide? (I = 2‚ C = 2) 6) Name five people and describe how they contributed to our current knowledge of DNA (their discovery/discoveries). (A = 5‚ C = 2) Mitosis 1) A cell with 10 chromosomes undergoes mitosis. Indicate how many chromosomes would be expected in each of the daughter cells. (I = 1‚ C = 2) 2) During interphase‚ what event must occur for the cell capable of undergoing future divisions? (A = 1‚ C = 2) 3) Using
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Characteristics to Compare | Items to be Compared (# 3 Description) | Similarities and/or Differences | | Asexual Reproduction | Sexual Reproduction | | Process Description | Mitotic division‚ requiring only one parent. Offspring are identical replicas of parent. Cell divides after DNA is replicated. No gametes are formed‚ can also occur by fragmentation (a piece of the organism breaking off) | Meiotic division. 2 parents are required. Each parent contributes ½ of the genetic
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immobile pupa. Over the next four days‚ the body is completely remodeled to give the adult winged form‚ which then hatches from the pupal case and is fertile within about 12 hours. Fruit fly has four pairs of chromosomes: the X/Y sex chromosomes and the autosomes 2‚ 3‚ and 4. the fourth chromosome is very tiny and rarely heard from. The size of the genome is about 165 million bases and contains and estimated 14‚000 genes (by comparison‚ the human genome has 3‚400 million bases and may have about 22‚500
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and Catharanthus roseus (L.) Don. (periwinkle) were studied using iron-acetocarmine squash technique. The chromosome number of C. roseus is 2n=16 while both M. oleifera and E. pulcherrima have 2n=28. Although late disjunction and presence of laggards were noted at Metaphase I‚ Anaphase I and II‚ Telophase I and II were 100% normal. These would indicate that lagging chromosomes were able to catch up‚ reached the opposite poles‚ and were included in daughter nuclei. Highly normal meiosis
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mitosis but not cytokinesis. The result would be Student Response Value A. daughter cells that are unusually small. B. a cell with two nuclei. 100% C. a cell with one nucleus containing twice the normal number of chromosomes. D. daughter cells with too few chromosomes. E. daughter cells with no nucleus. Score: 1/1 7. Which of the following is the correct order of events in the cell cycle? Student Response Value A. S‚ G1‚ G2‚ cytokinesis‚ mitosis B. S‚ G1‚ G2‚ mitosis
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WAGR Syndrome WAGR (Wilms’ tumor‚ Aniridia‚ Genitourinary abnormalities‚ and mental Retardation) Syndrome is a contiguous gene deletion syndrome that is caused by a deletion in chromosome 11. The acronym for the syndrome comes from the various symptoms that are caused by the deletion – wilms’ tumor‚ aniridia‚ genitourinary abnormalities‚ and mental retardation. Wilms’ tumor is a tumor that is found in the kidneys that causes nephroblastoma‚ cancer of the kidneys. Aniridia‚ the absence of the iris
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Exam Review – January 2013 Diversity Unit - List taxonomic ranks in order. What is the significance of this order? Domain‚ Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species. Classification of species: kingdoms contain many different types of organisms‚ each taxon contains progressively fewer types of organisms‚ taxon “species” is narrowest category‚ containing only one type of organism. As you go from kingdom to species‚ organisms share more and more in common. - Explain and give an example
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one gamete and nourish and protect it Egg Cell (Ovum; 1 copy each chromosome) Sperm Cell (1 copy of each chromosome) MEIOSIS (a type of cell division that begins with a cell with 2 copies of each chromosome and ends with 4 cells with 1 copy of each chromosome) FERTLIZATION (Fusion of Egg and Sperm nuclei; creates a cell with 2 copies of each chromosome) Zygote (cell formed by fusion of egg and sperm; has 2 copies of each chromosome; will develop into new individual) Ovary (in female) Testis (in
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the usual pair of two X chromosomes (“What is TS?”). This condition was named after Dr. Henry Turner‚ who was one of the first researchers to describe the features of Turner’s Syndrome in 1930s. TS occurs in about 1 female out of every 2‚000 female births‚ but is much more common in miscarriages. A diagnosis of TS is made through a karyotype test. This is performed on cells in the amniotic fluid before birth and on cells in the blood after. In a karyotype‚ the chromosomes in the white blood cells
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dominant inheritance – 1 parent carries the defective gene. The child has a 50% chance of inheriting the condition. An example of this would Huntington Disease. Dominant X-linked inheritance – this happens when a single abnormal gene on the X chromosome causes a disease. The abnormal gene dominates the gene pair. Although rare‚ an
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