Use the recombination frequencies listed below to map five...

Use the recombination frequencies listed below to map five SNP loci (a, b, c, d, e) onto a single chromosome. recombination frequency of a-b equals 17% recombination frequency of d-e equals 21% recombination frequency of c-e equals 9% recombination frequency of b-d equals 5% recombination frequency of a-d equals 12% recombination frequency of a-c equals 18% 24. Based on the results above, in what order do these SNPs occur along the chromosome? A. a, b, c, d, e B. c, e, d, a, b C. a, c, e, d, b D. c, e, a, d, b E. a, e, c, d, b 25. What recombination rate would you predict for c-d? A. 35% B. 30% C. 18% D. 12% E. 9% 26. What recombination rate would you predict for SNPs a and e? A. 35% B. 30% C. 18% D. 12% E. 9% 27. What is the distance, in map units, between SNPs b and c? A. 5 m.u. B. 12 m.u. C. 17 m.u. D. 21 m.u. E. 35 m.u.

Transcript

00:01 Hello everyone in this question we have been given recombination frequency okay and we know that crossing over is directly proportional to the distance between the gene okay so the more the distance more will be the crossing over and hence more will be the recombination frequency okay so one percent of recombination frequency means one map unit of the distance okay so here in question we have been given that a and b are 17 percent have 17 percent of recombination frequency okay so let's arrange them together as asked in the first question okay so when we will arrange this on the chromosome here is the chromosome okay so here we can see that in option c option a it said that a and b are together okay so if a and b are together that means they have 17 percent of recombination frequency then it's c that says b and c okay and then it's d okay so we can see that and after that it's written e okay we can say that d and e have 21 percent of uh recombination frequency so if they are disclosed that means the recombination frequency cannot be 21 percent it should be far to have this much of decombination frequency so this a option is incorrect okay now let's see the b option which says that it is the the order is c e d a and b and b now let's see it says that d and e are 21 but again it is so close that 21 % is not possible here so now let's see the option c okay now in option c it's a c c e d and b okay here also d and e are closed so 21 % is not possible okay now let's see the option d okay that is that says that c e okay and then a d and b is here and b is here okay so here now we can see that d and e are a little far so here we can say that 21 that is 21 map unit is possible here okay and then we have seen that a and c are 18 apart so this can also be possible okay so 18 % recombination frequency can be possible here and then let's say a and b are 17 % apart okay so this is also possible then they say that c and e are 9 % apart so they are very close here so 9 % recombination is possible here and then we say that b and b are 5 % apart so this is also possible okay then a and b are 12 % apart so this is also possible so our right answer is option d okay now in the next question been asked that what recombination would be present between c and d.

03:30 Okay, so when looking at the order that we found in the previous question, we have this order, okay? in which we know that c and e are 9 % apart, okay? and c and a are 18 % apart.

03:50 So by this, we can know that e and a are 9 % apart.

03:55 Apart that is a minus nine would be nine so this is nine person recombination frequency means nine map unit apart okay now we need to find the distance between c and d here okay and we know that a and d have the recombination frequency of 12 percent okay so here now we can find out that here we have 18 percent frequency and in a and d we have 12 % of recombination frequency okay so this will be is equal to 18 plus 12 % that will be 30 % okay so our answer is 30 % that is option b okay so c and we have the recombination frequency rate of 30 % okay now in the next question we need to find the recombination frequency rate between a and e.

04:58 So now again, let's put it in the order c, e, a, d, b.

05:04 We have the recombination frequency between c and e as 9 % and between c and a as 18%.

05:11 And here we have to find between a and e...

Question

Please give Ace some feedback