Genetics 101: Learn the Basics of Genetics

Explain DNA as deoxyribonucleic acid in the nucleus, forming a double helix with A-T and G-C pairs, condensed into chromosomes by histones, including autosomal and sex pairs from both parents.

Explore how genes, the functional units of heredity on chromosomes, encode proteins, while alleles—variations of the same gene at a locus—shape inherited traits through dominant and recessive interactions.

Explore how we receive one paternal and one maternal allele from genes, and contrast mitosis with meiosis, highlighting genetic diversity through crossing over and haploid gametes.

Explore Gregor Mendel's pea plant experiments, the father of modern genetics, and learn how dominance, segregation, and independent assortment, along with true-breeding crosses, shape heredity.

Explore the laws of segregation, dominance, and independent assortment, including Mendel’s F1 and F2 ratio insights, allele segregation during gamete formation, and dihybrid versus monohybrid crosses.

Explore how Punnett squares predict offspring genotypes and phenotypes from monohybrid and dihybrid crosses, using allele notation, dominant and recessive traits, and the foil method.

Explore how genetic disorders arise from mutations in DNA and genes during meiosis, and inherited traits from parents influence health.

Compare inherited and acquired genetic disorders and how they arise and are transmitted. Learn how mutations, chromosomal abnormalities, and environmental factors contribute to these disorders.

Explore the major genetic disorder types—Mendelian single-gene disorders (autosomal dominant, recessive, X-linked), chromosomal abnormalities like aneuploidy and deletions, and multifactorial, mitochondrial, epigenetic, and polygenic disorders.

Explore how genetic disorders affect physical health, emotional well-being, and social dynamics for individuals and families, and highlight genetic counseling in risk assessment, testing guidance, and care coordination.

Explore genetic markers as identifiable, heritable variations in DNA that pinpoint chromosome locations and trace trait inheritance, with a focus on SNPs and short tandem repeats.

Learn how single nucleotide polymorphisms (SNPs) and short tandem repeats (STRs) serve as genetic markers for disease susceptibility, drug response, and forensic analysis.

Discover how genetic markers drive linkage analysis, map genes, identify disease-associated genes via GWAS, illuminate ancestry, and enable forensic and paternity testing through STRs.

Explore genetics basics, including heredity, variation, and transmission of traits. Learn DNA, genes, chromosomes, alleles, mitosis and meiosis, Mendel's laws, Punnett squares, mutations, disorders, and genetic markers.