Hox基因如何充当身体的“位置密码”？
How do Hox genes act as the body's 'position code'?
Hox基因沿胚胎前后轴按顺序排列，决定各体节发育成何种结构，从蝇到人都高度保守，是动物身体蓝图的核心调控基因。
Hox genes are arrayed along the embryo's head-to-tail axis and specify what each segment becomes; conserved from flies to humans, they are core to the animal body plan.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Richard Dawkins,《The Selfish Gene》Oxford,1976;中译《自私的基因》中信出版社,2012
R. Dawkins, The Selfish Gene, Oxford University Press, 1976; Chinese ed. CITIC, 2012
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1966488W：The Selfish Gene（按标题+作者
#Hox基因 #身体蓝图 #保守
内共生学说怎样解释线粒体的来历？
How does endosymbiotic theory explain the origin of mitochondria?
该学说认为线粒体源自被早期真核细胞吞入并共生的细菌，保留了自己的环形DNA和双层膜，证据包括其分裂方式与细菌相似。
The theory holds that mitochondria came from bacteria engulfed and kept as symbionts by early eukaryotes, retaining circular DNA and double membranes, and dividing like bacteria.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Richard Dawkins,《The Selfish Gene》Oxford,1976;中译《自私的基因》中信出版社,2012
R. Dawkins, The Selfish Gene, Oxford University Press, 1976; Chinese ed. CITIC, 2012
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1966488W：The Selfish Gene（按标题+作者
#内共生 #线粒体 #起源
所有真核生物的共同祖先是谁？
Who is the common ancestor of all eukaryotes?
真核生物（动物、植物、真菌、原生生物）都源自一个拥有细胞核和线粒体的共同祖先，约在十几亿年前出现，之后分化出各大类群。
All eukaryotes (animals, plants, fungi, protists) descend from a common ancestor with a nucleus and mitochondria that appeared over a billion years ago and then diversified.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Richard Dawkins,《The Selfish Gene》Oxford,1976;中译《自私的基因》中信出版社,2012
R. Dawkins, The Selfish Gene, Oxford University Press, 1976; Chinese ed. CITIC, 2012
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1966488W：The Selfish Gene（按标题+作者
#真核 #共同祖先 #起源
猛犸象基因组研究有哪些意义？
What is the significance of woolly mammoth genome research?
测序猛犸象基因组帮助重建其适应寒冷的特征，也为探讨“去灭绝”与冷冻标本的遗传保护提供模型和伦理讨论。
Sequencing the mammoth genome helps reconstruct its cold adaptations and fuels debate on 'de-extinction' and genetic conservation of frozen specimens.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Webb Miller, Daniela I. Drautz, Aakrosh Ratan, Barbara N. Pusey,《Sequencing the nuclear genome of the extinct woolly mammoth》,Nature,2008 (DOI: 10.1038/nature07446)
Webb Miller, Daniela I. Drautz, Aakrosh Ratan, Barbara N. Pusey, 'Sequencing the nuclear genome of the extinct woolly mammoth', Nature, 2008, DOI: 10.1038/nature07446
独立核验依据 · Independent verification: 核验依据 1 OpenAlex DOI 10.1038/nature07446
#猛犸象 #基因组 #去灭绝
古DNA为何难以保存？科学家如何克服？
Why is ancient DNA hard to preserve, and how do scientists cope?
古DNA会因水解和氧化高度降解、且易被现代DNA污染，科学家用无菌发掘、超净实验室和短片段测序来提取并验证古老序列。
Ancient DNA degrades badly via hydrolysis and oxidation and is easily contaminated; scientists use sterile digging, clean labs, and short-fragment sequencing to recover and verify old sequences.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Kelman, Moran,《Degradation of ancient DNA》,Current Biology,1996 (DOI: 10.1016/s0960-9822(02)00460-8)
Kelman, Moran, 'Degradation of ancient DNA', Current Biology, 1996, DOI: 10.1016/s0960-9822(02)00460-8
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1016/s0960-9822(02)00460-8
#古DNA #降解 #污染
同源器官和同功器官有什么不同？
How do homologous and analogous structures differ?
同源器官源自共同祖先、结构相似（如蝙蝠翼与人臂）；同功器官功能相似却来源不同（如昆虫翅与鸟翼），分别揭示亲缘与趋同演化。
Homologous structures share ancestry and layout (bat wing vs human arm); analogous ones share function but not origin (insect vs bird wing), revealing kinship versus convergent evolution.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Richard Dawkins,《The Selfish Gene》Oxford,1976;中译《自私的基因》中信出版社,2012
R. Dawkins, The Selfish Gene, Oxford University Press, 1976; Chinese ed. CITIC, 2012
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1966488W：The Selfish Gene（按标题+作者
#同源 #同功 #趋同
同源器官为什么能揭示亲缘关系？
Why do homologous structures reveal relatedness?
同源器官（如人臂、蝙蝠翼、鲸鳍的骨骼布局）源自共同祖先的同一结构，虽功能不同但骨骼排列相似，是演化亲缘的化石级证据。
Homologous structures (human arm, bat wing, whale flipper) derive from the same ancestral blueprint; despite different functions, similar bone layout reveals shared ancestry.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Richard Dawkins,《The Selfish Gene》Oxford,1976;中译《自私的基因》中信出版社,2012
R. Dawkins, The Selfish Gene, Oxford University Press, 1976; Chinese ed. CITIC, 2012
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1966488W：The Selfish Gene（按标题+作者
#同源器官 #骨骼 #亲缘