The champion boxer fought bravely to defend his title, but was finally __________ by a knockout blow.
The champion boxer fought bravely to defend his title, but was finally __________ by a knockout blow.
目前在转基因小鼠中常用的基因敲除技术（gene knockout）的基本原理是：
目前在转基因小鼠中常用的基因敲除技术（gene knockout）的基本原理是：
中国大学MOOC: 目前在转基因小鼠中常用的基因敲除技术（gene knockout）的基本原理是：
中国大学MOOC: 目前在转基因小鼠中常用的基因敲除技术（gene knockout）的基本原理是：
The champion boxer fought bravely to defend his title, but was finally _________ by a knockout blow. A: laid low B: put up C: placed first D: kicked out
The champion boxer fought bravely to defend his title, but was finally _________ by a knockout blow. A: laid low B: put up C: placed first D: kicked out
The champion boxer fought bravely to defend his title, but was finally by a knockout blow. A: laid low B: lay low C: lie low D: lying low
The champion boxer fought bravely to defend his title, but was finally by a knockout blow. A: laid low B: lay low C: lie low D: lying low
A gene knock-in (or knock-in) refers to a genetic engineering method that involves the one-for-one substitution of DNA sequence information in a genetic locus or the insertion of sequence information not found within the locus. A gene knock-in therefore can be seen as a gain of function mutation and a gene knockout a loss of function mutation, but a gene knock-in may also involve the substitution of a functional gene locus for a mutant phenotype that results in some loss of function.
A gene knock-in (or knock-in) refers to a genetic engineering method that involves the one-for-one substitution of DNA sequence information in a genetic locus or the insertion of sequence information not found within the locus. A gene knock-in therefore can be seen as a gain of function mutation and a gene knockout a loss of function mutation, but a gene knock-in may also involve the substitution of a functional gene locus for a mutant phenotype that results in some loss of function.