作者onehundred (111)
看板Biology
标题Re: [问题] 请问homologies 同源性 的精确定义
时间Thu Dec 1 11:44:39 2005
※ 引述《amateratha (大天使长路西法)》之铭言：
: 小弟我对这个字的定义有点不明，其定义究竟是纯粹描述
: 不同生物在解剖结构或基因序列的相似或相同？
: 还是其定义是在讲生物的共同祖先？
: 烦请诸位赐教，谢谢～
取自NCBI的定义
希望对你有些帮助
http://www.ncbi.nlm.nih.gov/Education/BLASTinfo/glossary2.html
Homology :
Similarity attributed to descent from a common ancestor.
Similarity
The extent to which nucleotide or protein sequences are related. The extent of
similarity between two sequences can be based on percent sequence identity and
/or conservation. In BLAST similarity refers to a positive matrix score.
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