La especialización de rasgos facilita la capacidad autónoma de apareamiento en una planta de apareamiento mixto

Hanna Makowski1, Keric Lamb1, Austin M Kim1

  • 1Department of Biology, University of Virginia, P.O. Box 400328, Charlottesville, 22904, Virginia, USA.

American journal of botany
|September 5, 2025
PubMed
Resumen

Los pelos recolectores de polen en la Campanula americana, que alguna vez se pensó que fomentaban el cruce, en realidad están relacionados con la capacidad egoísta. Su longitud y dinámica de retracción varían según el sistema de apareamiento, lo que apoya la evolución de apareamiento mixto.

Videos de Conceptos Relacionados

Dihybrid Crosses01:18

Dihybrid Crosses

Overview
75.7K
Monohybrid Crosses01:20

Monohybrid Crosses

Overview
231.0K
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...
23.7K
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
22.2K
Asexual Reproduction02:38

Asexual Reproduction

Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
33.7K
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.
56.5K