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Monohybrid Problems llustrating Codominance 5. Another type of monohybrid 'inheritance involves the expression of both phenotypes in the heterozy- gous situation. This is called codominance. One well-known example of codominance occurs in the coat color of Shorthorn cattle. Those with reddish-gray roan coats are heterozygous (RR'), and result from a mating between a red (RR) Shorthorn and one that's white (R'R'). Roan cattle don't have roan-colored hairs, as would be expected with incom- plete dominance, but rather appear roan as a result of having both red and white hairs. Thus, the roan col- oration is not a consequence of pigments blending in each hair. Because the R and R' alleles are both fully expressed in the heterozygote, they are codominant. a. If a roan Shorthorn cow is mated with a white bull, what will be the genotypic and phenotypic ratios in the F, generation? genotypic ratio . phenotypic ratio - b. List the parental genotypes of crosses that could produce at least some white offspring roan offspring

Monohybrid Problems llustrating Codominance 5. Another type of monohybrid 'inheritance involves the expression of both phenotypes in the heterozy- gous situation. This is called codominance. One well-known example of codominance occurs in the coat color of Shorthorn cattle. Those with reddish-gray roan coats are heterozygous (RR'), and result from a mating between a red (RR) Shorthorn and one that's white (R'R'). Roan cattle don't have roan-colored hairs, as would be expected with incom- plete dominance, but rather appear roan as a result of having both red and white hairs. Thus, the roan col- oration is not a consequence of pigments blending in each hair. Because the R and R' alleles are both fully expressed in the heterozygote, they are codominant. a. If a roan Shorthorn cow is mated with a white bull, what will be the genotypic and phenotypic ratios in the F, generation? genotypic ratio . phenotypic ratio - b. List the parental genotypes of crosses that could produce at least some white offspring roan offspring

Human Anatomy & Physiology (11th Edition)
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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Monohybrid Problems llustrating Codominamce 5. Another type of monohybrid inheritance involves the expression of both phenotypes in the heterozy- gous situation. This is called codominance. One well-known example of codominance occurs in the coat color of Shorthorn cattle. Those with reddish-gray roan coats are heterozygous (RR'), and result from a mating between a red (RR) Shorthorn and one that's white (R'R'). Roan cattle don't have roan-colored hairs, as would be expected with incom- plete dominance, but rather appear roan as a result of having both red and white hairs. Thus, the roan col- oration is not a consequence of pigments blending in each hair. Because the R and R' alleles are both fully expressed in the heterozygote, they are codominant. a. If a roan Shorthorn cow is mated with a white bull, what will be the genotypic and phenotypic ratios in the F, generation? genotypic ratio . phenotypic ratio b. List the parental genotypes of crosses that could produce at least some white offspring roan offspring
Transcribed Image Text:Monohybrid Problems llustrating Codominamce 5. Another type of monohybrid inheritance involves the expression of both phenotypes in the heterozy- gous situation. This is called codominance. One well-known example of codominance occurs in the coat color of Shorthorn cattle. Those with reddish-gray roan coats are heterozygous (RR'), and result from a mating between a red (RR) Shorthorn and one that's white (R'R'). Roan cattle don't have roan-colored hairs, as would be expected with incom- plete dominance, but rather appear roan as a result of having both red and white hairs. Thus, the roan col- oration is not a consequence of pigments blending in each hair. Because the R and R' alleles are both fully expressed in the heterozygote, they are codominant. a. If a roan Shorthorn cow is mated with a white bull, what will be the genotypic and phenotypic ratios in the F, generation? genotypic ratio . phenotypic ratio b. List the parental genotypes of crosses that could produce at least some white offspring roan offspring
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