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Midterm 1 Results…
Midterm 1 Results…

... Making a Genetic Map in Yeast - QS5 » What % of gametes are recombinant? “random spore” ...
PDF - Arteriosclerosis, Thrombosis, and Vascular Biology
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... recombination, recurrence of the same mutation also decreases disequilibrium. A particular mutation may have arisen multiple times in different individuals on different chromosomal backgrounds. In this case, disequilibrium with surrounding markers may only exist in population subgroups that may not ...
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Association Studies of Vascular Phenotypes

... recombination, recurrence of the same mutation also decreases disequilibrium. A particular mutation may have arisen multiple times in different individuals on different chromosomal backgrounds. In this case, disequilibrium with surrounding markers may only exist in population subgroups that may not ...
Slide 1
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... the genetic variation that makes evolution possible  Sexual reproduction shuffles alleles to produce new combinations in three ways. 1. Homologous chromosomes sort independently as they separate during anaphase I of meiosis. 2. During prophase I of meiosis, pairs of homologous chromosomes cross ove ...
Chromosomal Inheritance
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Coin Child Lab – Answer Sheet
Coin Child Lab – Answer Sheet

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... course, living organisms possess all these attributes. Interestingly, artificial systems can be designed that possess these attributes, and they can be shown to evolve. In this section we will consider the following system: (i) allelic variation among genes carried by individuals, (ii) reproduction ...
Heredity File
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... • The offspring has two versions of the same gene for every characteristic—one from each parent. • Different versions of a gene are known as alleles. • Dominant alleles are shown with a capital letter, “B” and recessive alleles are shown with a lowercase version “b” of the same letter. ...
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... is mutated. So, in this example, the loss of function of the gene results in an uncoordinated phenotype. It is important to remember that mutations in many different genes could result in the same phenotype. There are hundreds of unc genes that are necessary for normal worm movement, and they could ...
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Case-Parent Triads

... that the relative risk is greater or less than multiplicative when the variant allele is carried by both mother and fetus. Using the model with both C (case) and M (mother), one can test for significant loss of fit when either one is omitted, using the likelihood ratio test. This allows a test of wh ...
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Dominance (genetics)



Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics. Often the dominant allele codes for a functional protein whereas the recessive allele does not.A classic example of dominance is the inheritance of seed shape, for example a pea shape in peas. Peas may be round, associated with allele R or wrinkled, associated with allele r. In this case, three combinations of alleles (genotypes) are possible: RR, Rr, and rr. The RR individuals have round peas and the rr individuals have wrinkled peas. In Rr individuals the R allele masks the presence of the r allele, so these individuals also have round peas. Thus, allele R is dominant to allele r, and allele r is recessive to allele R. This use of upper case letters for dominant alleles and lower caseones for recessive alleles is a widely followed convention.More generally, where a gene exists in two allelic versions (designated A and a), three combinations of alleles are possible: AA, Aa, and aa. If AA and aa individuals (homozygotes) show different forms of some trait (phenotypes), and Aa individuals (heterozygotes) show the same phenotype as AA individuals, then allele A is said to dominate or be dominant to or show dominance to allele a, and a is said to be recessive to A.Dominance is not inherent to an allele. It is a relationship between alleles; one allele can be dominant over a second allele, recessive to a third allele, and codominant to a fourth. Also, an allele may be dominant for a particular aspect of phenotype but not for other aspects influenced by the same gene. Dominance differs from epistasis, a relationship in which an allele of one gene affects the expression of another allele at a different gene.
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