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相关概念视频

Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...

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相关实验视频

Updated: Jul 11, 2026

In situ Protocol for Butterfly Pupal Wings Using Riboprobes
06:19

In situ Protocol for Butterfly Pupal Wings Using Riboprobes

Published on: May 28, 2007

一种虫的饮食诱导的发育多态性.

E Greene

    Science (New York, N.Y.)
    |February 3, 1989
    PubMed
    概括

    在Nemoria arizonaria中,毛虫的发育受到饮食的影响. 食物植物中的素度,如树的或叶子,触发了不同的毛虫形式的发展,影响模仿.

    科学领域:

    • 生态生态学 生态生态学
    • 进化生物学 进化生物学
    • 化学生态化学生态学

    背景情况:

    • 昆虫的幼虫发育可以表现出多性,导致不同的形态.
    • 尼莫利亚亚利桑尼亚毛虫表现出季节性多功能性,模仿树或树枝.
    • 假设这种发育性可塑性受到饮食因素的影响.

    研究的目的:

    • 调查饮食中的二次化合物,特别是色素在诱发Nemoria arizonaria毛虫的多态发育中的作用.
    • 为了确定幼虫的食中的宁度是否决定了猫或枝枝的发展.

    主要方法:

    • 在不同的饮食中养殖Nemoria arizonaria毛虫:天然树毛虫 (低),树叶 (高),以及含有不同酸度的人造饮食.
    • 观察和记录毛虫从每种食治疗中产生的形态 (模仿小猫或小枝) 的结果.

    主要成果:

    • 只有低素养的毛毛虫养的毛毛虫变成了毛毛虫变形.
    • 食高素叶子的毛虫发展成枝状的形态.
    • 养在含有高宁度的人造饮食上的毛毛虫主要发展为树枝形态,即使基本饮食是猫头.

    结论:

    • 幼虫的食中素度是一个关键的环境提示,触发了Nemoria arizonaria的多态发育.

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    Drosophila Pupal Abdomen Immunohistochemistry
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    Drosophila Pupal Abdomen Immunohistochemistry

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  • 饮食诱导的多性使毛虫能够根据食物资源的季节性可用性及其化学成分来调整其形态以进行伪装.
  • 这项研究强调了植物化学防御对昆虫发育和模仿的重大影响.