Background and/or InstructionsProblem N° 9Objective: To apply the concept ofcodominance in the prediction of horse coatcolor.In codominance, both alleles are expressed;both gene products are measurable orvisible as an additional phenotype that isneither dominant nor recessive norintermediate. In incomplete (partial)dominance an intermediate trait isproduced.Cremello:Palomino:Chestnut:almost whitegolden with lighter mane and tailreddish brownCoat color of horses is a very complex trait.The colors cremello, chestnut and palominocan be explained using a codominant modelThe following table gives ratios obtained in matings of the above horse (Equus caballus) varieties:CrossParentsOffspringof inheritance and are known to becremello x cremelloall cremellodetermined by alleles at a single locus inhorses.chestnut x chestnutall chestnutFor this problem, use the genotypes:IIcremello x chestnutall palominoC'C' = cremelloC'C? = chestnutIVpalomino x palomino% chestnut% palomino% cremelloc'c' = palomino.a. If cross IV (palomino X palomino) is represented by C'C² x c'C², what are the genotypic proportions ofthe offspring?Locus = is the physical position of an alleleon a chromosome (plural loci). As theposition of a gene (or allelic form of one),the concept of locus becomes importantwhen mapping chromosomes, i.e., locatingthe positions of loci.b. Cross I (remello x chestnut) can be represented by C'C* x C°C², what is the genotype of the palominooffspring?Although mass sequencing projects mayhave obviated the need for chromosomemapping, the association (linkage) betweenor among alleles led to importantdiscoveries and applications in genetics.c. Why do crosses I (cremello X cremello) and II (chesnut X chesnut) produce all cremello and all chestnut,respectively, if cremello X chestnut produces all palomino?

Gregor Mendel, through his wonderful work on pea plants, discovered the fundamental laws of…

Cross Parents Offspring cremello x cremello all cremello chestnut x chestnut all chestnut II cremello x chestnut all palomino % chestnut % palomino IV palomino x palomino % cremello a. If cross IV (palomino X palomino) is represented by C'C? x C'C', what are the genotypic proportions of the offspring? b. Cross II (cremello X chestnut) can be represented by C'C* x c°c?, what is the genotype of the palomind offspring? c. Why do crosses I (cremello X cremello) and II (chesnut X chesnut) produce all cremello and all chestnur respectively, if cremello X chestnut produces all palomino?

Cross Parents Offspring cremello x cremello all cremello chestnut x chestnut all chestnut II cremello x chestnut all palomino % chestnut % palomino IV palomino x palomino % cremello a. If cross IV (palomino X palomino) is represented by C'C? x C'C', what are the genotypic proportions of the offspring? b. Cross II (cremello X chestnut) can be represented by C'C* x c°c?, what is the genotype of the palomind offspring? c. Why do crosses I (cremello X cremello) and II (chesnut X chesnut) produce all cremello and all chestnur respectively, if cremello X chestnut produces all palomino?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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