网友您好，请在下方输入框内输入要搜索的题目：

搜题

题目内容（请给出正确答案）

提问人：网友mmmwar 发布时间：2022-01-07

[主观题]

Which of the following is an example of an epigenetic change in eukaryotes？

A、a loss of an AT base pair from a gene

B、the addition of methyl groups to cytosines in the promoter region of a gene

C、the substitution of an AT base pair by a GC base pair in a gene as a result of a mistake during DNA replication

D、a deletion that simultaneously removes two genes from the genome

E、None of these examples represents epigenetic changes.

简答题官方参考答案（由简答题聘请的专业题库老师提供的解答）

查看官方参考答案

更多“Which of the following is an example of an epigenetic change in eukaryotes？”相关的问题

第1题

Which of following is NOT true of about identities?

A、Identities are dynamic.

B、Identities are created through communication.

C、Identities are multi-complex.

D、Identities are fully formed at birth.

点击查看答案

第2题

Which of the following species is considered a model genetic organism?

A、the plant Linaria vulgaris

B、the deer mouse Peromyscus maniculatus

C、the worm Caenorhabditis elegans

D、the frog Hyla chrysoscelis

E、the chimpanzee Pan troglodytes

点击查看答案

第3题

In overdominance, the HIGHEST fitness is found in which genotype?

A、homozygote for the dominant allele

B、homozygote for the recessive allele

C、heterozygote

D、mutant

E、inbred recessive

点击查看答案

第4题

The only way for evolution to take place is if there is _____ within a population.

A、nonrandom mating

B、natural selection

C、genetic drift

D、Hardy–Weinberg equilibrium

E、genetic variation

点击查看答案

第5题

Which one of the following topics of research belongs to the discipline of transmission genetics?

A、inheritance pattern of gene alleles

B、mechanism of DNA replication

C、gene expression patterns

D、evolution

E、chemical modification of nucleic acids

点击查看答案

第6题

In eukaryotes, chromosomes do NOT contain:

A、ribosomes

B、chromatin

C、proteins

D、histones

E、DNA

点击查看答案

第7题

A Barr body is a(n):

A、gene on the X chromosome that is responsible for female development.

B、patch of cells that has a phenotype different from surrounding cells because of variable X inactivation.

C、inactivated X chromosome, visible in the nucleus of a cell that is normally from a female mammal.

D、extra X chromosome in a cell that is the result of nondisjunction.

E、extra Y chromosome in a cell that is the result of nondisjunction.

点击查看答案

第8题

Many viruses that are associated with cancers in animals are _____ that use reverse transcriptase.

A、papilloma viruses

B、Epstein-Barr viruses

C、retroviruses

D、hepatitis B viruses

点击查看答案

第9题

A testcross includes:

A、one parent who is homozygous recessive for one gene pair and a second parent who is homozygous recessive for a second gene pair.

B、one parent who is homozygous dominant for one or more genes and a second parent who is homozygous recessive for these same genes.

C、two parents who are both heterozygous for two or more genes.

D、one parent who shows the dominant phenotype for one or more genes and a second parent who is homozygous recessive for these genes.

E、one parent who shows the recessive phenotype for one or more genes and a second parent who is homozygous dominant for these genes.

点击查看答案

账号：尚未登录

登录没有账号？去注册

搜题记录

联系客服

购买搜题卡

考试指南全部 >

河南2024年上半年自学考试成绩查询时间：5月14日 2024自考大专报考要求是什么需要前置学历吗 24上半年湖北自学考试成绩查询官网入口详解 2024年上海10月自考新生报名时间及考试报考入口 24上半年云南成人自考成绩查询时间最新通知初中毕业生怎么自考大专步骤流程有哪些 24上半年河南自学考试成绩查询官网入口详解 2024自考下半年报名时间和考试时间安排表成人高考自己报名和机构报名有什么区别及2024年安徽成人高考的形势如何？及安徽成 24上半年河南自学考试成绩查询具体步骤操作指南

购买搜题卡查看答案

购买前请仔细阅读《购买须知》

请选择支付方式

微信支付

支付宝支付

点击支付即表示你同意并接受《服务协议》和《购买须知》

立即支付已付款，但不能查看答案，请点这里登录即可>>

搜题卡使用说明

1. 搜题次数扣减规则：

功能	扣减规则
功能	基础费（查看答案）	加收费（AI功能）
文字搜题、查看答案	1/每题	0/每次
语音搜题、查看答案	1/每题	2/每次
单题拍照识别、查看答案	1/每题	2/每次
整页拍照识别、查看答案	1/每题	5/每次