You were taking the subway to class one day and captured several family members
ID: 90369 • Letter: Y
Question
You were taking the subway to class one day and captured several family members of an unknown rodent species on the platform. You gave them to your genetics professor to analy/c. and she performed the following crosses. The F2 progeny arc the result of crossing the FI progeny to each other. PI: wispy whisker, pink eye. hairy female #1 x thick whisker, brown eye. hairless male #A FI: all wispy whisker, brown eye, hairy rodents F2: 910 wispy whisker, brown eye. hairy rodents 290 thick whisker, brown eye, hairless rodents 110 thick whisker, pink eye. hairless rodents 280 wispy whisker, pink eye, hairy rodents 3 wispy whisker, brown eye, hairless rodents 4 thick whisker, brown eye, hairy rodents 1 wispy whisker, pink eye, hairless rodents 2 thick whisker, pink eye, hairy rodents What arc the dominance patterns of the traits? What are the genotypes of each parental group? Which, if any, of the genes are linked? What arc the map distances between the linked genes Male C, elegans expressing the recessive mutations I (long), r (rolling), t (touch insensitive), and u (uncoordinated) are crossed to phenotypically wild-type females. The phenotypes of the 3288 F2 progeny are shown below. 653 uncoordinated, long, rolling, touch insensitive 670 long, rolling, touch insensitive 675 wild type 655 uncoordinated 73 uncoordinated, long 71 long 73 uncoordinated, rolling, touch insensitive 74 rolling, touch insensitive 88 uncoordinated, long, rolling 83 long, rolling 85 uncoordinated, touch insensitive 84 touch insensitive 1 uncoordinated, long, touch insensitive 1 long, touch insensitive 1 uncoordinated, rolling 1 rolling Diagram the genotype of the female parent. Map the loci (i.e.. determine the position and map distances among the genes). Is there evidence of interference? Justify your answer with numbers.Explanation / Answer
Answer:
2. a) From the obtained F1 progeny, we can say dominant pattern of the traits. Here, wispy whisker is dominant over thick whisker. Brown eye is dominant over pink eye and hairy is dominant over hairless.
b) (i) The genotype of female parent is: WWbbHH
The genotype of male patent is: wwBBhh
(ii) Yes, from the obtained F2 results the phenotypic ratio we can say the genes are unlinked.
(iii) By observing parental and double crossovers, the gene order is:
H is in the middle of W and B.
The distance between W and H is as follows:
110 + 280 + 1 + 2 = 393
= (393 / 1600) x 100
= 24.5625
Thus, the distance between W and H is 24.56 m.u
The distance between H and B is as follows:
3 + 4 + 1 + 2 = 10
= (10 / 1600) x 100
= 0.625
Thus, the distance between W and H is 0.625 m.u
(Since there are more than 1 questions, the first full question have been answered according to the rules of Chegg)
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