Jove
Visualize
Contact Us

Related Concept Videos

Types of Selection01:46

Types of Selection

45.7K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
45.7K
Frequency-dependent Selection01:21

Frequency-dependent Selection

24.4K
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.
24.4K
Trihybrid Crosses02:27

Trihybrid Crosses

26.4K
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...
26.4K
Dihybrid Crosses01:18

Dihybrid Crosses

82.0K
Overview
82.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Mitogenome of northern long-eared bat.

Mitochondrial DNA. Part B, Resources·2020
Same author

THE GENUS: A MACROEVOLUTIONARY PROBLEM.

Evolution; international journal of organic evolution·2017
Same author

TESTING MACROEVOLUTIONARY HYPOTHESES WITH CLADISTIC ANALYSIS: EVIDENCE AGAINST RECTANGULAR EVOLUTION.

Evolution; international journal of organic evolution·2017
Same author

Microhabitat selection in two species of heteromyid rodents.

Oecologia·2017
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Mar 6, 2026

Caenorhabditis Sieve: A Low-tech Instrument and Methodology for Sorting Small Multicellular Organisms
04:39

Caenorhabditis Sieve: A Low-tech Instrument and Methodology for Sorting Small Multicellular Organisms

Published on: July 4, 2018

6.7K

Seed size selection in heteromyids : A second look.

Cliff A Lemen1

  • 1Division of Mammals, Field Museum of Natural History, Roosevelt Road at Lake Shore Drive, 60605, Chicago, IL, USA.

Oecologia
|March 18, 2017
PubMed
Summary
This summary is machine-generated.

Heteromyids, or kangaroo rats, do not select seeds based on body size. This study analyzed new data and existing literature, finding no evidence for seed size selection in these rodents.

More Related Videos

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract
10:07

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract

Published on: June 6, 2019

13.0K
Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
06:44

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

8.1K

Related Experiment Videos

Last Updated: Mar 6, 2026

Caenorhabditis Sieve: A Low-tech Instrument and Methodology for Sorting Small Multicellular Organisms
04:39

Caenorhabditis Sieve: A Low-tech Instrument and Methodology for Sorting Small Multicellular Organisms

Published on: July 4, 2018

6.7K
Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract
10:07

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract

Published on: June 6, 2019

13.0K
Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
06:44

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

8.1K

Area of Science:

  • Ecology
  • Zoology
  • Rodent Behavior

Background:

  • Seed size selection is a hypothesized foraging strategy in heteromyids (kangaroo rats).
  • Previous studies have suggested a link between rodent body size and seed size preference.
  • Understanding foraging behavior is crucial for heteromyid community dynamics.

Purpose of the Study:

  • To investigate whether heteromyids exhibit seed size selection based on their body size.
  • To analyze new and existing data on heteromyid feeding habits.
  • To challenge the prevailing hypothesis of seed size allocation in heteromyids.

Main Methods:

  • Analysis of new field data from central New Mexico.
  • Comprehensive literature review of heteromyid food habits.
  • Reanalysis of previously published data (Brown and Lieberman, 1973; Brown, 1975).

Main Results:

  • No evidence supports seed size selection by heteromyids relative to their body size.
  • A correlation was observed between rodent size and the tendency to husk seeds.
  • Larger heteromyids may utilize fruiting bodies composed of small seeds.

Conclusions:

  • The hypothesis of seed size allocation in heteromyids is not supported by current evidence.
  • Further research is needed to determine the ecological significance of observed foraging differences.
  • Future studies must provide empirical data to support or refute seed size selection hypotheses and their role in coexistence.