What is a genetic suppressor screen?

Question

BlackTom AI · Accepted Answer

Question restatement: What is a genetic suppressor screen?

Option a: 'a screen that identifies genes that makes a pre-existing condition worse' — This describes finding genes that worsen a condition, which aligns more with the concept of enhancers or aggravating mutations, not suppressors. In suppressor screens, we look for mutations that counteract or rescue the phenotype, not amplify it, so this option mischaracterizes the goal.

Option b: 'a screen that identifies genes that alleviate a pre-existing condition' — This matches the core idea of a suppressor screen: identify mutations or genes that suppress or alleviate a defect or phenotype. The screen is designed to find second-site mutations that reduce or reverse the mutant phenotype, thereby restoring function or improvement.

Option c: 'a screen in which a known gene is found to cause more than one condition' — This describes pleiotropy or a gene with multiple phenotypic effects, not a suppressor screen. It focuses on a gene's multiple roles rather than identifying suppressors of a phenotype.

Option d: 'A gene that directly suppresses the expression of another gene' — While a repressor protein can suppress gene expression, a genetic suppressor screen refers to identifying any gene whose mutation suppresses a phenotype, which can include various mechanisms beyond direct transcriptional repression. This option narrows the concept to direct suppression of expression, which is an incomplete description of what a suppressor screen entails.

In summary, option b accurately captures the purpose of a genetic suppressor screen by describing the identification of genes that alleviate a pre-existing condition, whereas the other options describe related but distinct ideas or mischaracterize the screening objective.

What is a genetic suppressor screen?单项选择题

类似问题

What happens during a dominant modifier screen in the fly?

The history of the Nation of Islam (NOI) reveals that they seek recruits from prison.

Malcolm was president of his 6th grade class, he was one of several Blacks students in his school; a straight “A” student, and well like by his peers.

E.D. Nixon graduated from Howard University, majoring in political science.

Sharon Collins links the rise of Black professions to market efficiency. In other words, the labor market success of the Black professional elite is tied to market efficiency.

Regarding the role of race and class in structing the Black community, for those who saw race as a dominant factor --- discrimination was a key obstacle to Black economic development and attainment.

According to Malcolm, what was his last school-grade completed?

Malcolm’s father was a Baptist minister, very outspoken and a ________________.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单