Lethal Epistasis Polygenic Description Cause death of the Interaction of genes One trait is organism who carries them. controlled by two or more different to dominate one or produce a new trait. genes Alleles CC Dominant Recessive CP PP Genol Pheno Table P. G Aa Domin CC ant CP aa recessi PP ve
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- When artificial selection is practiced over many generations, it iscommon for the trait to reach a plateau in which further selectionhas little effect on the outcome of the trait. This phenomenon isillustrated as shown. Explain why it occurs.Below are two unrelated DNA paternity tests: one indicates the manis the father and the other shows he is not. Can you tell which iswhich? C/AF = Child/Alleged father in one lane combined.What are some examplesof phenotypical characteristicsthat present two or morevarieties and of phenotypicalfeatures that do not vary? Inrelation to the genescorrespondent to thosecharacteristics that varyamong individuals what canbe expected about theiralleles?
- The differences between the genotype,genome, and gene pool; why a genotype cannever be composed of more than two allelesof the same gene, but the gene pool cancontain three or more alleles of one geneA recently married man and woman discover that eachhad an uncle with alkaptonuria (black urine disease), arare disease caused by an autosomal recessive allele of asingle gene. They are about to have their first baby. Whatis the probability that their child will have alkaptonuria?Among the most prevalent pathologies that afflicthuman beings is heart disease, which can have a severeimpact on quality of life and can even result in prematuredeath. While heart disease mostly afflicts those who areolder, 1% or 2% of people in their 30s, and even in their20s, suffer from this disease. Genetic and environmentalcomponents of this disease exist. What strategy mightyou use to choose families to participate in a GWAS ofheart disease–causing genes? Explain your reasoning.
- The assertion t the inherited factors are indispensable in determining the appearance of an individualHaving a widows peak is dominant W to not having one (ww)Having attached earlobes is a recessive trait (ee)- Jack and Jill are heterozygous for both traits.What's the probability of them having a child with a widow's peak and attachedearlobes?Pseudohypertrophic muscular dystrophy is an inheriteddisorder that causes gradual deterioration of the muscles. It isseen almost exclusively in boys born to apparently unaffectedparents and usually results in death in the early teens. Isthis disorder caused by a dominant or a recessive allele?Is its inheritance sex-linked or autosomal? How do youknow? Explain why this disorder is almost never seen in girls.
- Albinism is a condition in which pigmentation islacking. In humans, the result is white hair, nonpigmented skin, and pink eyes. The trait in humans iscaused by a recessive allele. Two normal parentshave an albino child. What are the parents’ genotypes?What is the probability that the next child will bealbino?It is the year 1998, and the men and women sailors (inequal numbers) on the American ship the MedischolBounty have mutinied in the South Pacific and settledon the island of Bali Hai, where they have come intocontact with the local Polynesian population. Of the400 sailors that come ashore on the island, 324 haveMM blood type, 4 have the NN blood type, and 72 havethe MN blood type. Already on the island are 600Polynesians between the ages of 19 and 23. In thePolynesian population, the allele frequency of the Mallele is 0.06, and the allele frequency of the N allele is 0.94. No other people come to the island over thenext 10 years.a. What is the allele frequency of the N allele in thesailor population that mutinied?b. It is the year 2008, and 1000 children have beenborn on the island of Bali Hai. If the mixed population of 1000 young people on the island in 1998mated randomly and the different blood groupphenotypes had no effect on viability, how manyof the 1000 children would you expect…The ________ genotype is an example of an incomplete dominant trait. CC CC CRCW C, R, C, W CRcW