Jove
Visualize
Contact Us
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 Concept Videos

The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

8.7K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
8.7K
X and Y Chromosomes02:32

X and Y Chromosomes

31.5K
Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
31.5K
Chromosomal Theory of Inheritance01:39

Chromosomal Theory of Inheritance

61.1K
In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
61.1K
Pedigree Analysis01:35

Pedigree Analysis

90.7K
Overview
90.7K
Meiosis I01:49

Meiosis I

221.6K
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
221.6K
Meiosis I03:09

Meiosis I

46.4K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
46.4K

You might also read

Related Articles

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

Sort by
Same author

Pyridostigmine inhibits placental necroptosis and ameliorates preeclampsia-like symptoms in rats.

Biochemical pharmacology·2026
Same author

Retraction notice to "Genetic population data of Yfiler Plus kit from 1434 unrelated Hans in Henan Province (Central China)" [Forensic Sci. Int.: Genet. 22 (2016) e25-e27].

Forensic science international. Genetics·2026
Same author

Pyridostigmine Attenuated Placental Ischemia-Upregulated Paraventricular Nucleus TLR4-Associated Hypertension in Preeclamptic Rats.

Molecular neurobiology·2026
Same author

Pyridostigmine attenuates placental-ischemia-upregulated placental angiotensin II type 1 receptor in rats.

Peptides·2025
Same author

Gastrin-releasing peptide in the paraventricular nucleus exerts hypertensive effects in preeclampsia.

Neurochemistry international·2025
Same author

Genetic Origins of the Kiritimati Population from Central-Eastern Micronesia.

Genome biology and evolution·2025
Same journal

Parental and public views on genomic newborn screening: a systematic review.

European journal of human genetics : EJHG·2026
Same journal

Correction: follow-up, cancer risk and mortality in Peutz-Jeghers syndrome: data from the PRED-IdF network.

European journal of human genetics : EJHG·2026
Same journal

Characterisation of the SMN1/2 locus using a highly specific variant caller on whole-genome sequence data from 500,000 individuals.

European journal of human genetics : EJHG·2026
Same journal

When truncation is not loss of function: neo-tail architecture as a determinant of pathogenicity in NMD-escaping frameshift variants.

European journal of human genetics : EJHG·2026
Same journal

CMIP as a novel candidate gene for neurodevelopmental and neuropsychiatric disorders.

European journal of human genetics : EJHG·2026
Same journal

Parent and professional experiences of a clinical trial of prenatal and postnatal stem cell therapy for severe osteogenesis imperfecta.

European journal of human genetics : EJHG·2026
See all related articles

Related Experiment Video

Updated: Mar 24, 2026

2D and 3D Chromosome Painting in Malaria Mosquitoes
09:57

2D and 3D Chromosome Painting in Malaria Mosquitoes

Published on: January 6, 2014

10.9K

Mayans: a Y chromosome perspective.

David Perez-Benedico1, Joel La Salvia1, Zhaoshu Zeng2

  • 1Biology Department, Miami Dade College, Miami, FL, USA.

European Journal of Human Genetics : EJHG
|March 10, 2016
PubMed
Summary
This summary is machine-generated.

Mayan genetics reveal high homogeneity with two main Y-chromosome haplogroups, Q1a2a1a1*-M3 and Q1a2a1*-L54. Despite geographic spread, genetic diversity is uniform, suggesting recent population expansion and gene flow.

More Related Videos

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus
10:52

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus

Published on: May 25, 2019

10.7K
Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
09:25

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM

Published on: May 8, 2020

11.4K

Related Experiment Videos

Last Updated: Mar 24, 2026

2D and 3D Chromosome Painting in Malaria Mosquitoes
09:57

2D and 3D Chromosome Painting in Malaria Mosquitoes

Published on: January 6, 2014

10.9K
Gamete Collection and In Vitro Fertilization of Astyanax mexicanus
10:52

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus

Published on: May 25, 2019

10.7K
Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
09:25

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM

Published on: May 8, 2020

11.4K

Area of Science:

  • Population Genetics
  • Human Genetics
  • Archaeogenetics

Background:

  • Limited understanding of Mayan genetic history despite extensive archaeological and cultural data.
  • Previous research has not comprehensively analyzed the Y chromosome composition of contemporary Mayan populations.

Purpose of the Study:

  • To investigate the Y chromosome composition of contemporary Mayan populations.
  • To address the knowledge gap in Mayan population genetics.

Main Methods:

  • Analysis of Y-chromosome single nucleotide polymorphisms (Y-SNP) and short tandem repeats (Y-STR) markers.
  • Investigation of five geographically targeted and ethnically distinct Mayan populations.

Main Results:

  • Mayan populations exhibit high genetic homogeneity, primarily composed of two autochthonous haplogroups: Q1a2a1a1*-M3 and Q1a2a1*-L54.
  • Y-STR data reveal uniform distribution of genetic diversity across geographically distant Mayan populations.
  • Absence of population partitioning suggests recent expansion and gene flow.

Conclusions:

  • The genetic landscape of Mayan populations is characterized by homogeneity and recent expansion.
  • Factors such as agriculture, city-state development, and commerce likely facilitated gene flow within the Mayan domain.