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Solution Manual For Genetics: From Genes to Genomes,, 7th Edition

Find all the textbook answers you need with Solution Manual For Genetics: From Genes to Genomes,, 7th Edition, featuring clear, step-by-step solutions.

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1-1chapter1Mendel’s Principles of HereditySynopsisChapter 1 covers the basic principles of inheritance that can be summarized as Mendel’s Laws ofSegregation (for one gene) and Independent Assortment (for more than one gene).Key termsgenes and alleles of genes – A gene determines a trait, and different alleles or forms of agene exist. The color gene in peas has two alleles: yellow and green.genotype and phenotype – Genotype is the genetic makeup of an organism (written asalleles of specific genes), while phenotype is how the organism looks.homozygous and heterozygous – When both alleles of a gene are the same, theindividual is homozygous for that gene (or pure breeding). If the two alleles aredifferent, the organism is heterozygous (also called a hybrid).dominant and recessive – The dominant allele is the one that controls phenotype in theheterozygous genotype; the recessive allele controls phenotype only in a homozygote.monohybrid or dihybrid cross – a cross between individuals who are both heterozygotesfor one gene (monohybrid) or for two genes (dihybrid).testcross – performed to determine if an individual with the dominant characteristic ishomozygous or heterozygous: An individual with the dominant phenotype butunknown genotype is crossed with an individual with the recessive phenotype.Key ratios3:1 – Ratio of progeny phenotypes in a cross between monohybrids[Aa×Aa→3A– (dominant phenotype) : 1aa (recessive phenotype)]1:2:1 – Ratio of progeny genotypes in a cross between monohybrids(Aa×Aa→1AA : 2Aa : 1aa)1:1 – Ratio of progeny genotypes in a cross between a heterozygote and a recessive homozygote(Aa×aa→1Aa : 1aa)1:0 – All progeny are the same phenotype. Can result from either of two cases:[AA×– –→A– (all dominant phenotype)][aa×aa→aa (all recessive phenotype)]9:3:3:1 – Ratio of progeny phenotypes in a dihybrid cross(Aa Bb×Aa Bb→9A–B– : 3A–bb : 3aa B – : 1aa bb)

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Genetics: From Genes To Genomes by ...

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