Evolution of Australian Biota 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent Identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana including: Matching continental margins Gondwana once consisted of South America‚ Africa‚ Madagascar‚ India‚ Antarctica‚ Australia‚ New Zealand and New Guinea. Continental margin: zone between the ocean basin
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insecticides. Spirogyra is apart of the phylum Charophyta and is a plant-like autotroph because it is part of green algae. Spirogyra participates in sexual reproduction through a process called isogamy. Isogamy is the sexual reproduction of similar gametes. These gametes can be male or female‚ but because of similar morphology they
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before we eventually become the person we are. “It appears to be reasonably established that the functional gametes of many organisms are derived from primordial germ cells already present in early embryogenesis”(Clement 3). Before gametogenesis‚ the primordial germ cells drift towards the gonads‚ where eventually they differentiate into gametes. However‚ gametogenesis is the process leading to gamete production‚ the development and maturing of sex cells through meiotic division. This is a situation whereby
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(Kernel phenotype) Kernel genotype A A X aa Gametes A A X a a Possible genotypes of F1 generation Aa Aa Aa Aa (All Coloured) Parents phenotype Coloured X Coloured Parents genotype Aa X Aa Gametes A a X A a Possible genotypes
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to genetics. T 2. If an individual has a Gg genotype‚ half of his gametes should have the G allele‚ and the other half should have the g allele. F 3. A Punnett square is a chart that allows you to easily determine the expected genotypes in the offspring of two parents. (expected percents) T 4. In a cross between two homozygous dominant individuals‚ 25% of the offspring may have the recessive phenotype. F 5. A parent cell makes gametes through the process of mitosis. T 6. It is entirely likely for a
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GENETICS CELL ORGANELLES ETC. CHAPTER 4: Cell Division and Reproduction related PP: cell division 4.1 - Cell Division and Genetic Material TERMS: Genetics: the study of heredity and variation of living organisms and how genetic information is passed from one generation to the next Somatic cell: a plant or animal cell that forms the body of the organism; excludes reproductive cells Chromosome: a structure in the nucleus that contains DNA Sister chromatid: one of two chromosomes that
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Product of meiosis I spermatocyte 6) Why are spermatids not considered functional gametes? They are non-motile and have too much excess baggage to function well in a reproductive capacity. 7) Differentiate between spermatogenesis and spermiogenesis Spermiogenesis is the final stage of spermatogenesis‚ which sees the maturation of spermatids into mature‚ mobile spermatozoa. * Formation of haploid gametes by male sloughing off excess spermatid cytoplasm to form a functioning sperm 8) Draw
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Part 2: Effects of Environment on Mitosis. Experimental Hypothesis: If we put onion root tips in IAA solution then the rate of Mitosis will increase. Null Hypothesis: There will be no difference Part 1- Post Lab Question If a cell contains a set of duplicated chromosomes‚ does it contain any more genetic information than the cell before the chromosomes were duplicated? No‚ because if it is duplicated‚ it would have the same number of chromosomes unless there was a
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DAUGHTER CELLS Most cell division results in daughter cells with identical genetic information‚ DNA. Cell grows‚ splits in half‚ cell grows‚ splits in half and so on…. A special type of division produces nonidentical daughter cells (gametes‚ or sperm and egg cells‚ or spores). CELLULAR ORGANIZATION OF THE GENETIC MATERIAL All the DNA in a cell constitutes the cell’s genome. A genome can consist of a single DNA molecule (common in prokaryotic cells) or a number
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instructions to make and operate parts of our bodies. (learn.genetics.utah.edu‚ 2004) Genes are passed from parent to offspring through a type of cell division called meiosis. Meiosis is used in the production of sex cells. (Gametes) The Female gamete is the ova and the male gamete is the sperm. “This process results in the chromosome number being halved‚ so instead of pairs of chromosomes in each resulting cell‚ there is only one chromosome from each pair.” (Lofts‚ G. 2012) This genetic information
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