1. A pair of genes AB are completely linked together, so they are tightly linked. Give the genotypic ratio of the cross between a heterozygous and recessive parents. 2. Why is coefficient of coincidence a basis for strength of linkage?
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1. A pair of genes AB are completely linked together, so they are tightly linked. Give
the genotypic ratio of the cross between a heterozygous and recessive parents.
2. Why is coefficient of coincidence a basis for strength of linkage?
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- A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Though the two brands have been comparable in the past, some technological advances were recently made in the Brand 1 manufacturing process, and the consumer group is testing to see if Brand1 will outperform Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same 10 cars, chosen at random. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the Español left front wheel, and the rest to have Brand 2 there. After all of the cars are driven over the standard test course for 20,000 miles, the amount of tread wear (in inches) is recorded, as shown in the table below. Car 1 3 4 6. 8 69 10 Brand 1 0.23 0.29 0.28 0.23 0.17 0.26 0.17 0.29 0.30 0.21 Brand 2 0.22 0.27 0.27 0.29 0.31 0.24 0.27 0.33 0.22 0.25 Difference…Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and sol treatment. An experiment was conducted to compare peach tree seedling growth with sol and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non-Normality. The following results were obtained: x (cm) s (cm) Herbicide A 945 10 Herbicide B 109.1 A 95% confidence interval for ug - Ha is given by which of the following expressions? (Use the conservative value for degrees of freedom) (109 1-94 5) t1 96 (109 1-94 5) + 2 263 109 1- 94 5)2196, . (109 1- 945)2262, (109 1- 94 5)7. A sociological study consists of recording the marital status, religion, race, and income of an individual. If marital status is classified into one of four categories, religion into one of three categories, race into one of five categories, and income into one of five categories, how many outcomes are possible for the experiment of recording the information of one of these individuals?
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- Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and soil treatment. An experiment was conducted to compare peach tree seedling growth with soil and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A. The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non-Normality. The following results were obtained: (cm) s (cm) Herbicide A Herbicide B 94.5 109.1 10 A 95% confidence interval for uB - HA is given by which of the following expressions? (Use the conservative value for degrees of freedom.) 102 9? (109.1- 94.5) t 1.96. 102 92 (109.1- 94.5) + 2.262. 9 10 (109.1- 94.5) + 1.96, 10 V 10 102…1. Assume your computer network may have been hacked and computers may have 2 different types of viruses (virus type-A and virus type-B). The current situation shows that 15% of computers end up with type-A virus, 10% end up with type-B virus, and 10% of the computers infected with type-A or type-B virus have both viruses. 1.a) Compute the probability that a computer is infected with both viruses 1.b) Compute the probability that a computer has type-B virus given that it has type-A virus2. A container includes six components from supplier A, seven from supplier B, and eight from supplier C. What is the likelihood that each supplier will have at least one component examined if four of the components are chosen at random for testing?
- A student whose hobby is fishing pulled a carp out of Cayuga Lake that was very unusual: it had no scales on its body. She decided to investigate whether this strange “nude” phenotype had a genetic basis. She obtained some inbred carp that were pure-breeding for the wild-type scale pattern in which the fish had scales covering their body. She crosses these wild-type fish with her nude fish. To her surprise, the F1 progeny were wild-type fish and fish with a single, linear row of scales on the sides of their body (i.e. “linear). The ratio of these progeny was 2:1. She then crosses some of her F1 fish and obtains four phenotypes: wildtype, linear, nude and a new phenotype in which the fish had a few scales scattered over their body (i.e. “scattered”). The ratio of these offspring was 6:3:2:1. a. How many genes are involved in producing scales on these fish? ___________________ b. What is going on genetically that explains all of these results? Show your work below. I really. need…2. Suppose AB Drug Company develops a new drug, designed to prevent colds. The company states that the drug is equally effective for men and women. To test this claim, they choose a simple random sample of 100 women and 160 men from a population of 100,000 volunteers. At the end of the study, 38% of the women caught a cold; and 51% of the men caught a cold. Based on these findings, can we reject the company's claim that the drug is equally effective for men and women? Use a = 0.05 level of significance.5. Two processes A and B, were used to produce stainless steel shafts in an industrial company. Process A and Process B produce 9% and 12% nonconforming stainless steel shafts, respectively. a. A random sample of 100 stainless steel shafts were taken from Process A. What is the UTM probability that more than 95% of the stainless steel shafts are conforming? b. A random sample of 90 stainless steel shafts from Process A and 80 stainless steel shafts UTM UT UTM 8U from Process B were taken randomly. Find the probability that the difference between proportion of the nonconforming stainless steel shafts from Process A and Process B UTM UTM is at most 0.1. O UTM UT UTM 6 UTM U O UTM UT