In an effort to identify the influence of genetic factors on both Type 1 diabetes and Type II diabetes, researchers calculated concordance rates for monozygotic twins. Concordance rates of 30–50% have been found for Type I diabetes with concordance rates of 80% for Type II. For both kinds of diabetes, dizygotic concordance rates were about 15%. What does this information suggest concerning the relative effect of genetic and environmental factors for each type of diabetes? a. Genetic influences exert a larger role in Type II diabetes than in Type I diabetes. b. Genetic factors have little or no role in the occurrence of Type I diabetes. c. Type II diabetes appears to be caused by a single, unidentified gene. d. Type II diabetes is primarily determined by non-genetic factors. e. Environmental factors have no role in

In an effort to identify the influence of genetic factors on both Type 1 diabetes and Type II diabetes, researchers calculated concordance rates for monozygotic twins. Concordance rates of 30–50% have been found for Type I diabetes with concordance rates of 80% for Type II. For both kinds of diabetes, dizygotic concordance rates were about 15%. What does this information suggest concerning the relative effect of genetic and environmental factors for each type of diabetes? a. Genetic influences exert a larger role in Type II diabetes than in Type I diabetes. b. Genetic factors have little or no role in the occurrence of Type I diabetes. c. Type II diabetes appears to be caused by a single, unidentified gene. d. Type II diabetes is primarily determined by non-genetic factors. e. Environmental factors have no role in

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter18: Genetics Of Behavior

Section: Chapter Questions

Problem 14QP: A pedigree analysis was performed on the family of a man with schizophrenia. Based on the known...

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In an effort to identify the influence of genetic factors on both Type 1 diabetes and Type Il diabetes, researchers calculated concordance rates for monozygotic twins. Concordance rates of 30-50% have been found for Type I diabetes with concordance rates of 80% for Type II. For both kinds of diabetes, dizygotic concordance rates were about 15%. What does this information suggest concerning the relative effect of genetic and environmental factors for each type of diabetes? O a. Type Il diabetes appears to be caused by a single, unidentified gene. O b. Genetic factors have little or no role in the occurrence of Type I diabetes. O c. Environmental factors have no role in the occurrence of either type of diabetes. O d. Type Il diabetes is primarily determined by non-genetic factors. O e. Genetic influences exert a larger role in Type II diabetes than in Type I diabetes. 1 points Save Answer
Pairs of genetically related people were examined with regard to the rate at which they metabolize glucose. For 25 pairs of individuals that had each of the following relationships, correlation coefficients for glucose metabolism were determined: Mother-daughter: 0.36 Mother-granddaughter: 0.17e Sister-sister: 0.39 Sister-sister (fraternal twins): 0.40 Sister-sister (identical twins): 0.77 What is the average heritability for the rate of glucose metabolism in this group of females?
ADHD is a highly heritable trait with published broad sense heritability estimates in the range of 0.6- 0.9. Larsson et al. 2014 (doi: 10.1017/S0033291713002493 ) reported the concordance values shown in the table below for pairs of monozygotic (MZ) or dizygotic (DZ) twins with data for male and female pairs shown separately, using data from the Swedish twin register (59,000 twin pairs, born between 1959 and 2001). Male MZ twins Male DZ twins Female MZ twins Female DZ twins 56% 16% 37% 13% Based on the data in this table, does ADHD appear to be more heritable in males or females? Provide one sentence of rationale to support your answer.
What is the frequency of the aa genotype if the frequencies of AA and aa are 0.19 and 0.36?
In a population of 1,000 squirrels, 60 are melanistic. Agouti fur (each hair displays two or more bands of pigmentation) is dominant over melanistic fur (excess of pigmentation that leads to a dark, often almost black fur). How often is agouti fur expressed? 0.25 0.75 0.9375 0.06
Six single-nucleotide polymorphism (SNP) loci are known to contribute to the development of type 2 diabetes. Diabetes is certain if eight or more of the alleles at these six loci are of the “contributing” variety. An uppercase letter indicates an allele that contributes to diabetes and a lowercase symbol indicates a noncontributing allele. A married couple wants to know the probability of producing a child who is at severe risk of type 2 diabetes. Their genotypes were determined by microarray analysis and are as follows: AaBbccDDEEFf × AaBbCCDdEeFf
In investigating whether stress is a factor in aging, telomere length was measured in women with chronically ill children, and compared to the number of years since the child's diagnosis. Use the following summary data to calculate the correlation coefficient between telomere length and chronocity: Summary data: Sum of products: -11.564 Sum of squares for chronicity: 311.422 Sum of squares for telomere length: 2.499 Total sample size: 39
I'm having trouble finding the dependent and independent variables of this scenaro: Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children?
In one twin study investigating the genetics of addiction, 41% of monozygotic twins both exhibited substance dependence while 24% of dizygotic twins both exhibited substance dependence. Does this twin study suggest that there is or is not a genetic component to addiction? What evidence in model organisms supports a genetic component to addiction?
The heights of mothers and daughters are given in the following table: Height of mother (in) Height of daughter (in) 64 66 65 66 66 68 64 65 63 65 63 62 59 62 62 64 61 63 60 62 a. Calculate the correlation coefficient for the heights of the mothers and daughters. b. Using regression, predict the expected height of a daughter whose mother is 67 inches tall.
If the frequency of the aa genotype is 19%, what is the frequency of the AA genotype? Assume that there are only two alleles (i.e. a and A).
In a study conducted on human height, heritability estimates that were initially done on children with an average age of 5 years old was 74%. Heritability estimates were again performed on the same individuals when they reached adulthood with an average of 40 years old. The result was 30%. Explain the results.

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	a.	Genetic influences exert a larger role in Type II diabetes than in Type I diabetes.
	b.	Genetic factors have little or no role in the occurrence of Type I diabetes.
	c.	Type II diabetes appears to be caused by a single, unidentified gene.
	d.	Type II diabetes is primarily determined by non-genetic factors.
	e.	Environmental factors have no role in the occurrence of either type of diabetes.