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関連する概念動画

Inclusive Fitness00:57

Inclusive Fitness

Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.In the early 20th century,...
Law of Independent Assortment02:03

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.Intraspecific competition, which occurs between individuals of the same species, serves as a natural mechanism for regulating population size. Too much...
Trihybrid Crosses02:27

Trihybrid Crosses

Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...
Law of Independent Assortment02:03

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.

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Investigation of Genetic Dependencies Using CRISPR-Cas9-based Competition Assays
11:05

Investigation of Genetic Dependencies Using CRISPR-Cas9-based Competition Assays

Published on: January 7, 2019

ハミルトンの法則を親戚同士の競争で検証する.

S A West1, M G Murray, C A Machado

  • 1Institute of Cell, Animal & Population Biology, University of Edinburgh, UK. stu.west@ed.ac.uk

Nature
|February 24, 2001
PubMed
まとめ
この要約は機械生成です。

親族選択理論は,親族に対する攻撃が少なくなることを予測しています. しかし,この研究では,雄のフィギュアホースプの攻撃性は,親族関係とは関係なく,将来の交尾機会と負の相関があることがわかりました.

さらに関連する動画

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
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Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

関連する実験動画

Last Updated: Jun 5, 2026

Investigation of Genetic Dependencies Using CRISPR-Cas9-based Competition Assays
11:05

Investigation of Genetic Dependencies Using CRISPR-Cas9-based Competition Assays

Published on: January 7, 2019

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
15:00

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Published on: August 18, 2023

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

科学分野:

  • 進化生物学の進化生物学について
  • 行動生態学 行動生態学

背景:

  • ハミルトンの親族選別理論は,親族に対する攻撃性が減少すると仮定している.
  • 最近の理論は,親族の競争が利他主義のために親族の選択を覆す可能性があることを示唆しています.
  • 限られた分散は,多くの自然系における関連性と競争を混乱させる.

研究 の 目的:

  • ハミルトンの親族選別理論をフィギュアワスプでテストするために.
  • 攻撃性に関する関係と競争の相互作用を調査する.
  • 男性の攻撃性に対する親族関係と親族の競争の影響を区別する.

主な方法:

  • さまざまなフィギュアワスプの分類における比較分析.
  • 散らばらない雄の間で攻撃性のレベルを観察する.
  • 相互作用する雄の間の平均的な関係性の推定.
  • 関連性,競争,攻撃性の相関分析.

主要な成果:

  • 男性のフィギュアホースプの攻撃性は,相互作用する雄の親族関係と相関関係を示さなかった.
  • 攻撃性のレベルは,将来の交尾機会と負の相関関係にあった.
  • 発見は,ハミルトンの元の親族選択予測と矛盾している.

結論:

  • 親戚の競争は,必ずしも親戚に対する攻撃性を減らすとは限りません.
  • 血縁関係ではなく,将来の交尾の見込みが,雄の攻撃性の主要な原動力であるようです.
  • この研究は,近年の親族選択理論の理論的進歩に経験的根拠を提供している.