more nucleotides between two adjacent nucleotides. They range in size from small‚ one base pair to large‚ a section of a chromosome.When a section of a chromosome is entered into another chromosome insertions can occur due to unequal crossover in meiosis. There are two types of insertions‚ an P nucleotide insertion and a N region addition. An insertion in an F8 gene can cause haemophilia A.Haemophilia is an x linked bleeding disorder in humans that is caused by muatations in the F8 gene. Deletions
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Genetic engineering – humans tinker with organisms genes a. Cloning –take haploid cel and replace with a diploid nucleus (comes from organism whos traits you want to duplicate. b. Recombinant DNA – DNA from 2 or more sources. Done by Euk cells during Meiosis. Always from same molecule. 3) Biologists first started doing recombinant DNA from a prok cell and combined it with another prok cell because it was easier. 4) DNA from a euk cell and combine it with DNA from a prok cell Features of bacteria
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egg from archegonium. After one sperm fertilizes the egg‚ a zygote forms‚ thus forming a diploid cell (Hoshizaki 2001). The formation of the zygote exemplifies sporophytes’ alternation of generations via the diploid cell completing mitosis and meiosis yet still retaining a full set of genetic material. In other words‚ alternation of generation refers to going from a multicellular diploid form to a multicellular haploid form. (Hickok‚ Warne 2009). The fertilized egg develops into a sporophyte
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Population Genetics 2 Explain the statement “Populations‚ not the individual‚ evolves.” ~The statement "It is the population that evolves‚ not the individual‚" means that a single organism cannot evolve by itself. Natural selection is survival of the fittest‚ so the adaptations are relative to each other. 3 Explain how Mendel’s particulate hypothesis of inheritance provided much needed support for Darwin’s theory of evolution by natural selection. ~Mendel’s hypothesis of inheritance supported
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sexual reproduction 2. multicellularity Many protists reproduce only asexually – mitosis. Some use meiosis and sexual reproduction only in times of stress and then others reproduce sexually most of the time. What unites protists? The kingdom Protista contains all eukaryotes that don’t fit in animals‚ plants and fungi. See table on page 479
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and eukaryotic cell is the nucleus. Eukaryotic cells have a membrane enclosed nucleus‚ while prokaryotic cell does not. Prokaryotic cells reproduce and divides through binary fission‚ while eukaryotic cells reproduce and divides through mitosis and meiosis. However‚ despite the differences‚ both prokaryotic cells and eukaryotic cells contain ribosomes and DNA as their genetic material. Overall‚ prokaryotic cells is much differ than eukaryotic cells‚ as well as the structure of their organelles and
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SECTION I (40 Marks) Attempt all questions from this Section Question 1 (a) Name the following: (i) The respiratory pigment found in erythrocytes. (ii) The organ that produces urea. (iii) The part of the chloroplast where the light reaction of photosynthesis takes place. (iv) The Vehicular Standard for controlling air pollution. (v) The part of the ovary that produces progesterone. [5] (b) State whether the following statements are true or false. If false‚ rewrite the correct form of the
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Examination Timetables for 2013 Printed copies of your examination timetable‚ as displayed in myUnisa‚ will be accepted at Examination Venues together with identification documents. To print a copy: 1. Go to your "My Admin" site 2. Click on the link for "Examination Timetable" 3. Ensure that your mouse cursor has identified the correct part of the page (frame) 4. Click on the print function/icon of your Internet browser It is very important that you pay special attention to the dates and times
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from start to finish. It starts by discussing the crucial role DNA plays when it comes to reproduction‚ its so important due to DNA holding the chromosomes that give each human unique physical traits. From there they begin discussing the process of meiosis‚ the process of male sperm and female eggs. They describe sperm being more about quantity‚ whereas the female egg is all about quality. When the male sperm and a female egg meet‚ they create a union of chromosomes‚ taking unique traits from both the
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Amino Acid-the building blocks from which proteins are constructed Alpha-Globin- blood plasma protein that is separable from other globulins by electrophoresis. Anemia- a quantitative deficiency of the hemoglobin‚ often accompanied by a reduced number of red blood cells and causing pallor‚ weakness‚ and breathlessness. Prognosis-a forecasting of the probable course and outcome of a disease‚ especially of the chances of recovery Trait-This passed on in sex chromosones Symptom a phe
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