4. You are studying a large flock of chickens and divide it into two halves. Each half contains the same genetic variations at the same frequencies as in the other half. To one half (the control group) you feed normal chicken chow, to the other half (the experimental group) you feed normal chicken chow supplemented with a nutritional booster. As expected, in the experimental group the hens lay an average number of eggs greater than those in the control group. Yet the heritability remains the same in both the experimental and control groups. You can explain this observation by hypothesizing that the variation in nutrition among hens is, select one of the options below and justify your answer. A. smaller in the experimental group. B. larger in the experimental group. C. the same in both groups. D. smaller in the control group. E. larger in the control group.

4. You are studying a large flock of chickens and divide it into two halves. Each half contains the same genetic variations at the same frequencies as in the other half. To one half (the control group) you feed normal chicken chow, to the other half (the experimental group) you feed normal chicken chow supplemented with a nutritional booster. As expected, in the experimental group the hens lay an average number of eggs greater than those in the control group. Yet the heritability remains the same in both the experimental and control groups. You can explain this observation by hypothesizing that the variation in nutrition among hens is, select one of the options below and justify your answer. A. smaller in the experimental group. B. larger in the experimental group. C. the same in both groups. D. smaller in the control group. E. larger in the control group.

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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3. Codominance is when two dominant alleles of contrastingpair fully expressed at the same time in heterozygousindividual. Which of the following situation is an example ofcodominance?A. Jo mated the red bull with the white cow to produce a roan cow.B. Melissa traces her blood type by crossing the blood type of herparents.C. James passed a genetic disorder hypertrichosis pinnae aurisor hairy ear to his son.D. Tess crosses the red carnation flower plant with white flowercarnation plant to produce a pink flower plant.
1. what is the progeny difference of Sire B? 2. what is the progeny difference of Dam A?
1. Consider a locus having two alleles A1 and A2, If the homozygote A1A1 and the heterozygote A¡A2 have the same fitness of 1, and the homozygote A2A2 has a fitness s+1, then phenomenon is called complete dominance. What will be the change in the frequency of allele A2 per generation ?
3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Two red-eyed fruit flies were crossed, producing the following offspring: 76 red-eyed flies 24 purple-eyed flies a. What is the approximate ratio of red-eyed to purple-eyed flies? . b. Based on your experience with previous problems, what two genotypes give rise to this ratio?. c. What are the parents' genotypes?. d. What is the genotypic ratio of the F; offspring?. e. What is the phenotypic ratio of the F, offspring?
2. In a species of beetles, individuals may be red, black, white or tan. Colour is controlled by a single gene with multiple alleles in a dominance series. Red (R) is dominant to black (RP), black is dominant to white (RW) and white is dominant to tan (r) (R > RD > RW > r). Colour variation in this species is a female sex-limited trait. Males carry the colour genes but are always phenotypically tan regardless of their genotype. What are the genotypes of the parents of the following cross? black female x tan males produces 151 red females: 49 black females: 61 tan females: 249 tan males
1. what is the progeny difference of Sire B? 2. what is the progeny difference of Dam A?
4. You have two probes that detect RFLPS that are closely linked (that is, RFLP 1 and 2 tend to be passed on together). You have been asked to help settle a paternity case. The two possible fathers have the following RFLP pedigree. The child and mother are also probed with these two RFLP probes. Is one male more likely to be the father? If so, which one? Explain your reasoning. (The data below the pedigree are two Southern blots.) grandparents grandparents dad #1 dad #2 child mother Probe #1 Probe #2 ||
4. Listed below are the results from Mendel's crosses involving the texture of peas: P: smooth peas X wrinkled peas F,: all smooth F;: 5474 smooth and 1850 wrinkled What is the phenotypic ratio in the F2 generation ? (take the number of offspring in the largest category and divide it by the number of offspring in the smallest category) What can you conclude about the mode or pattern of inheritance ? Construct Punnett squares to support your conclusion.
3. You are studying single gene traits in peas. These are the traits you are following: Gene Symbol Alleles enistic Pairs Appeerance of Hybrid dominant ait) Seed eoler deteric Yellow pea is dominant to green Round pea is dominant to wrinkled Purple flower is dominant to white flowers Unripe pods are dominant to ripe pods Yly R/r Yellow P/p U/u ound Wrinkied Round Flower clor You cross pollen from a pea that is of genotype YyRrPpUu with ovules from a pea whose genotype is YYrrPpUU a. How many different types of gametes can the female produce? Pod color (up) b. How many different types of gametes can the male produce? C. What fraction of the progeny will be phenotypically identical the female parent? d. What fraction of the progeny will be phenotypically identical the male parent? e. What fraction of the progeny will be homozygous at all seven loci? f. What fraction of the progeny will be heterozygous at all seven loci?
3. For each possible genotype/phenotype, write down the number of alleles of each type: TT/taster: "taster" alleles "non-taster" alleles Tt /taster: "taster" alleles "non-taster" alleles tt/non-taster: "taster" allele "non-taster" alleles