1. In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and theallele for white is W. The heterozygous phenotype is known as erminette (black and white spotted). If 2erminette chickens are crossed, what is the probability that:They would have a black chick?They would have a white chick?%2. Human blood types are determined by genes that follow the CODMINANCE pattern of inheritance. There are2 dominant alleles (IA and IB) and one recessive allele (i).Blood Type (Phenotype)GenotypeCan donate blood to:Can receive blood from:iiA,B,AB and OA,B,AB,O (universalreceiver)АВJA|BABJAJA or 1AiАВ, АO,AАВ, ВO,B!al JO glala) Pretend the Brad Pitt is homozygous for the type B allele and Angelina Jolie is type "O". What are all thepossible blood types for the baby?b) Draw a Punnett square showing all the possible blood types for the offspring produced by type "O" motherand a type "AB" father PART 6: CODOMINANCE (1 POINT)There is another pattern of inheritance that also is an example of lack of dominance. In this situation, if theresulting phenotype exhibits both traits of the parents, the offspring phenotype is said to be the result ofcodominance. Examples of this include A and B blood types in humans, sickle-cell disease, and coat color incattle and horses.In this last example, cattle which are homozygous for a red coat allele are red, cattle which are homozygous for awhite coat allele are white, and heterozygous cattle appear roan (red hairs mixed with white) due to codominanceof the red and white coat color alleles, In this case it is common to use two different capital letters of the alphabetas superscripts to a common letter, to represent the red and white coat color alleles. For example, red cattfewould be C"c white cattle would be C"C" and roan cattle would be C"C", where:red coatCW = white coatandHow is this different from red, white, and pink flowers?Cattle coat color would be considered incompletely dominant if C"C" were completely pink, instead of a patchyred and white.Camation petal color would be considered codominant if RW were red and white striped, instead of solid pink.Nevertheless, both these patterns of inheritance are important for they deviate from the basicdominant/recessive pattern of inheritance.In summary:Cattle and Horse Coat ColorResulting PhenotypeGenotypec*CRC"CWC*CWRed coatWhite coatRoan coat (red hairs mixed with white)PRACTICE PROBLEM:A roan bull (male) is mated with a white cow (female). What are the possible offspring?Cow's genotype:Bull's genotype:Fill in the Punnett square and give the phenotypepercentages of this cross:Punnett square:color% arecolor% areCould Red offspring be born to a White cow mated with a Roan bull?

Gene is the specific sequence of nucleotides which encode a polypeptide.

Answered: 1. In some chickens, the gene for…

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 9CT

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