CHAPTER 8 1) DNA is found in structures called ______. -chromosomes 2) A(n) ______ is an example of an organism that can reproduce asexually. -amoeba 3)+++ Examine the figure below. Nucleosomes are made of ______. - DNA wrapped around histone proteins 4)++ As shown in the following figure‚ plant cell cytokinesis differs from animal cell cytokinesis because - Plant cells form a cell plate and animal cells do not 5)The chromosomes of eukaryotic cells are found in the _____ -Nucleus 6) Chromatin consists
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specific phenotype over the other. Stabilizing selection is when natural selections tries to favor an intermediate phenotype‚ therefore‚ the extreme’s are targeted towards the two species. Disruptive selection is when natural selection favors both phenotypes and typically eliminates the middle phenotype; hence‚ you end up with 2 different species. fitness The relative likelihood that a genotype will contribute to the gene pool of the next generation as compared with other genotypes. adaptations
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nucleotide polymorphism (SNP) residing on a neuronal acetylcholine receptor gene (CHRNB3). We replicate this family-based genetic association result on an independent sample in the Framingham Heart Study. This is the first study to identify a specific genotype associated with the tendency to occupy a leadership position. The results suggest that what determines whether an individual occupies a leadership position is the complex product of genetic and environmental influences‚ with a particular role for
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Chapter 8 The cellular Basis of Reproduction Inheritance Rain Forest Rescue • Scientists in Hawaii are attempting to "rescue" endangered species from extinction by promoting reproduction • Reproduction is one phase of an organism’s life cycle – Sexual reproduction • Fertilization of sperm and egg produces Offspring – Asexual reproduction • Offspring are produced by a single parent‚ without the participation of sperm and egg
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Cell Division and the Cell Cycle 1) Define the following terms: Meiosis The production of daughter cells that have one half the number of chromosomes as the parent cell. It enables organisms to reproduce sexually. Mitosis The production of two daughter cells that are identical to the parent cell. Parent cell=haploid‚ daughter cell=haploid. Parent cell=diploid‚ daughter cell=diploid. Chromosome A structure of nucleic acids and protein found in the nucleus of most living cells‚ which carry genetic
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represents the carbon to which the base is attached. 2. How does an organism’s genotype determine its phenotype? The genotype of an organism is the sum total of all the genes that it inherits. It is sort of like a blue print that is designed to serve as a guide in the development of the organism‚ so that it will become the same kind of creature as the parent or parents that it came from. The phenotype‚ the organism’s physical trait arises from the actions of a wide variety of proteins. For
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(blue legs)e) The following traits were found to be homozygous recessive:dd (2 body segments)tt (white tail)ii (o group blood type)f) Is your ReeBop a Purebred? Why or why not?No‚ our reebop Baljit is not a purebred. This is because there are many genotypes involved in making the reebop which means that the results will vary. Since most of the characteristics were heterozygous‚ this results in a creature that will not be a purebread as for different traits can form. Also the mating was very random which
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an intermediate phenotype When products of many genes influence a trait‚ individuals of a population show a range of continuous variation. Environmental Impact on Phenotype The environment has an impact on the phenotype of an individual. e.g. tanning makes skin darker‚ exercise alters build‚ nutrition influences height. Genotype is associated with a range of phenotypic possibilities due to environmental influences. Norm of reaction – the phenotypic range of a genotype influenced by the
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trait. 2) Which of the following statements regarding genotypes and phenotypes is false? A) The genetic makeup of an organism constitutes its genotype. B) An organism with two different alleles for a single trait is said to be heterozygous for that trait. C) Alleles are alternate forms of a gene. D) An allele that is fully expressed is referred to as recessive. E) The expressed physical traits of an organism are called its phenotype. 3) Which of the following most accurately restates
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Blueprint Of Life 1. Evidence of evolution suggests that the mechanisms of inheritance‚ accompanied by selection‚ allow change over many generations * Outline the impact on the evolution of plants and animals of: - Changes in physical conditions in the environment - Changes in chemical conditions in the environment - Competition for resources Physical Conditions | Chemical Conditions | Competition for resources | Change in physical conditions such as:- Temperature- Wind conditions-
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