作者mkmai0802 (Wengda)
看板Biotech
標題[求救] D1S80基因的問題!
時間Fri Aug 13 14:48:51 2010
大家好:
D1S80這個基因是為了要Fingerprinting.
這個基因位於chromosome1.
問題如下:
Knowung that there are 29 different alleles of D1S80, how many different
classes of homozygotes exist? How many duggerent classes of heterozygotes
exist? It was stated earlier that 435 different D1S80 genotypes are possible.
How was this number obtained ?
第一個問題是29嗎?
第二個問題是29乘以28嗎?
第三個435就完全不懂了 !
有哪位神人大大可以解答 !
還有一題:
The sizes of the PCR products of the D1S80 locus in one family 531 and 643 bp
in the mother and 435 and 531 bp in the father. What are all possible fingerprints
their children could have ?
謝謝各位大大了 ><
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1F：→ crement:(29+1)x29/2 08/13 14:56
2F：→ mkmai0802:可以請問為什麼 要+1嗎 ? 08/13 16:01
3F：→ mkmai0802:除以2 應該是會有相同的 所以要減半 ?! 08/13 16:02
4F：→ auxotroph:[29*(29-1)]/2+29=435 08/14 16:13
5F：→ fc01:第一題29第二題C(29取2) 08/16 02:04
6F：→ fc01:C(29取2)=29!/(29-27)!*27!=1*2*...*29/1*2*1*2*...*27 08/16 02:06
7F：→ fc01:=28*29/2=406 08/16 02:07