QUESTION 2In the following cross, +s +a X +s +a, how many offspring do you expect to have sepia eyes and wt wings?а. 3/16b. 9/16Oc. 1/16O d. 3/4 After a dihybrid cross, +s +a X +s +a, you collect the following data in the table.How many flies were expected to be sepia and apterous?PhenotypeNumberof FliesWild type5000Sepia2000Apterous1900Sepia &700Apterousa. 5400b. 1800О с. 1600

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Description: QUESTION 2In the following cross, +s +a X +s +a, how many offspring do you expect to have sepia eyes and wt wings?а. 3/16b. 9/16Oc. 1/16O d. 3/4 After a dihybrid cross, +s +a X +s +a, you collect the following data in the table.How many flies were e

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QUESTION 2 In the following cross, +s +a X +s +a, how many offspring do you expect to have sepia eyes and wt wings? а. 3/16 O b. 9/16 Oc. 1/16 d. 3/4

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 2ACQ: Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are...

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The F1 flies described in question 1 were mated with brown-eyed flies from a true-breeding line. What phenotypes would you expect the offspring to have? (a) all with red eyes (b) all with brown eyes (c) half with red eyes and half with brown eyes (d) red-eyed females and brown-eyed males (e) brown-eyed females and red-eyed males
. In nature, the plant Plectritis congesta is dimorphic forfruit shape; that is, individual plants bear either winglessor winged fruits, as shown in the illustration.Wingless fruit Winged fruitPlants were collected from nature before floweringand were crossed or selfed with the following results:Number of progenyPollination Winged WinglessWinged (selfed) 91 1*Winged (selfed) 90 30Wingless (selfed) 4* 80Winged × wingless 161 0Winged × wingless 29 31Winged × wingless 46 0Winged × winged 44 0*Phenotype probably has a nongenetic explanation.Interpret these results, and derive the mode ofinheritance of these fruit-shaped phenotypes. Usesymbols. What do you think is the nongeneticexplanation for the phenotypes marked by asterisks inthe table?
In the yellow milkweed bug: D – yellow spots on the wings, d – brown spots on the wings, E – 8 antennae segments, e – 7 antennae segments D d e e X D D E e What F1 phenotypes and phenotypic ratio would result from this cross?
What will be the phenotypic ratio of the offspring of a purebreed male fly with eosin eyes (CCXw-eY) mated to a red-eyed female who is heterozygous for both the cream (C) and eosin eyes (Xw-e) allele.
A researcher crosses two white-flowered lines ofAntirrhinum plants as follows and obtains the followingresults:pure line 1 × pure line 2↓F1 all whiteF1 × F1↓F2 131 white29 reda. Deduce the inheritance of these phenotypes; useclearly defined gene symbols. Give the genotypes ofthe parents, F1, and F2.b. Predict the outcome of crosses of the F1 with eachparental line.
In a vial of Drosophila, a research student noticedseveral female flies (but no male flies) with bag wingseach consisting of a large, liquid-filled blister insteadof the usual smooth wing blade. When bag-wingedfemales were crossed with wild-type males, 1/3 of theprogeny were bag-winged females, 1/3 were normalwinged females, and 1/3 were normal-winged males.Explain these results.
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Fruit flies can have straight wings (S) or curly wings (s), and they can have be female XX or male XY. (A) For a standard monohybrid cross (Ss ´ Ss), what proportion of the offspring will have the genotype ss? (Express the proportion as a simple fraction) (B) For the following cross (SsXX ´ SsXY), what proportion of the offspring will have the genotype Ss? (Express the proportion as a simple fraction) (C) What proportion will have the genotype XX? (Express the proportion as a simple fraction) (D) What proportion will have the genotype SsXX? (Express the proportion as a simple fraction)SHOW YOUR WORK
For the mating AaBBDdGg x AabbDdGG, draw the monhybrid punnet squares, one for each of the four genes shown in the cross. Assume that all genes assort independently. What fraction of the offspring would have the phenotype A_B_D_G? What fraction of the offspring would have the phenotype aaB_ddG_?
A wild-type fruit fly (heterozygous for gray body color andred eyes) is mated with a black fruit fly with purple eyes. Theoffspring are wild-type, 721; black purple, 751; gray purple, 49;black red, 45. What is the recombination frequency betweenthese genes for body color and eye color? Using informationfrom problem 3, what fruit flies (genotypes and phenotypes)would you mate to determine the order of the body color, wingsize, and eye color genes on the chromosome?
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