chromatids look at the opposite poles also every single one is attached to a kinetochore microtubule which comes from that pole. http://www.phschool.com/science/biology_place/biocoach/meiosis/metaii.html Fertilisation When fertilisation occurs 1 gamete from each of the parent joins to form a zygote this is due to the
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INVESTIGATION OF THE INHERITANCE OF THE ROSETTE GENE IN BRASSICA RAPA By: Justine Poorbaugh Foundations of Biology 2 Laboratory Thursday 2:30 PM Professor Cheek April 21‚ 2011 ABSTRACT The Brassica rapa is a rapid growing plant that has a standard form and a mutant rosette form. Relative to normal plants‚ the rosette form is shorter and takes longer to flower. The mode of inheritance of the rosette gene was tested by crossing two true-breeding plants‚ one of each form. The F1 generation
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tract preceding the intestine; it receives food to be digested. gonad Each of the two glands located in each arm‚ producing gametes (spermatozoids or ovules) depending on the sex of the starfish. pyloric cecum Radiated duct of the digestive tract producing digestive enzymes and also allowing digested food to be stored. gonopore Dorsal opening through which gametes (spermatozoids and ovules) are expelled into the water to be fertilized. intestine Section of the digestive tract between the
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produced during unfavourable conditions is (i) zoospore (ii) zygote (iii)zygospore (iv) spore 6. A multicellular green algae is(i) Chondrus (ii) Laminaria (iii) Chlamydomonas (iv) Ulva 7. Which one of the following does not have flagellated male gamete? (i) Red algae (ii) Brown algae (iii) Mosses (iv) Green algae 8. Which one of the following groups led to evolution of land plants? (i) Rhodophyta (ii) Phaeophyta (iii) Chlorophyta (iv) Cyanophyta 9.A distinct feature of bryophytes when compared
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The discovery of DNA is attributed to the research of three scientists in 1951; Francis Crick‚ Maurice Wilkins‚ and James Dewey Watson. They were all later accredited with the Nobel Prize in physiology and medicine in 1962. Thanks to their discovery‚ science has been able to research and learn from DNA blueprints and use recombinant DNA technology to discover answers‚ vaccines and build immunity for many viruses. In recent years science has been using this new technology to genetically modify animals
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copy of DNA must be available. Before DNA replication occurs‚ each chromosome consists of a single long strand of DNA called a chromatid. When a diploid cell undergoes meiosis‚ four unique haploid daughter cells are produced. It is important for gametes to be haploid Experiment: Following Chromosomal DNA in Meiosis 2. Why was the model of ONE chromosome composed of TWO identical strands of beads at the beginning of the experiment? To represent the dna sequence. 3. Why did you use the
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A Roman Catholic monk‚ Gregor Mendel (1822-1884)‚ was raised on a farm and enjoyed gardening and mathematics. In 1856 he started to experiment with pea plants to explain why certain traits that appeared in one generation did not always reappear in the next generation. During eight years Mendel mixed over 30‚000 plants by controlling their pollination and wanted to know why the results came to be. Mendel noticed that although there were some traits that were common amongst all the pea plants there
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poles Telophase I - Daughter cells have one chromosome from each homologous pair Interkinesis - Chromosome still consist of two chromatids 2. Mitosis is simple cell division‚ two identical cells. Meiosis is cell division for gametes (sex cells). from parents. 3. Gametes are haploid. 4. Fertilized egg is called a zygote. 5. Another name for a tetrad was a bivalent. Synaptonemal complex is a protein structure that forms between two homologous chromosomes during meiosis. Chiasma is the point where
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Michelle Kelly July 28‚ 2010 BIOL 2071 Section 001 Brassica Rapa Fast Plant Traits Experiment By: Tony Nguyen Group Members: Troy Kessler‚ Christopher Amo-Quarm Abstract: How are traits passed down from one generation to the next? Does the genes from both parent combine into 1 or are the inherited by a whole where 1 is express while the other stays dormant. Using Mendel’s Laws as a base for our experiment‚ we will determine the expected outcome of these
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phenotype- brown coloring‚ while the remaining 20% are albino. 640 members of the population have the genotype AA‚ 320 have Aa‚ and 40 have aa. If completely random mating were to occur‚ there would be an 80% chance that a gamete would bear the normal allele‚ A‚ and a 20% chance that the gamete would bear the albino allele‚ a. The resulting offspring will display the following genotype ratios: AA will have 64%‚ Aa 32% (the chance of the offspring having the A allele is 96%)‚ and aa 4%. The offspring have
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