Crash Course
Heredity: Crash Course Biology
Hank and his brother John discuss heredity via the gross example of relative ear wax moistness.
Crash Course
Natural Selection - Crash Course Biology
Hank guides us through the process of natural selection, the key mechanism of evolution.
Bozeman Science
Mendelian Genetics
Paul Andersen explains simple Mendelian genetics. He begins with a brief introduction of Gregor Mendel and his laws of segregation and independent assortment. He then presents a number of simple genetics problems along with their...
Curated Video
Incomplete Dominance and Codominance
Humans inherit two alleles for each gene, and their interaction determines how traits are expressed—homozygous if both alleles are the same, and heterozygous if they differ. In complete dominance, one allele masks the other; in...
Curated Video
Tips & Tricks for Pedigree analysis
Dominant trait needs only 1 affected allele, whereas recessive trait needs both allele. Normally a dominant trait will be seen in all generations, but a recessive trait may skip generations. We can have X-linked dominant or autosomal...
Science ABC
Why Do Some People Look More Like Their Grandparents Than Their Parents?
Our physical appearance is significantly influenced by our genes, which are inherited from our parents, who in turn receive their genetic material from their own parents. When your genetic makeup closely mirrors that of your...
Curated Video
Genotype
The genetic make-up of an individual. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract concepts and key...
Curated Video
Allele
Alternative forms of a gene, which affect the expression of a particular trait, such as eye colour or blood type. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Mendel and Inheritance
How a 19th century Austrian monk explained the rules of genetic inheritance before anyone even knew genes existed. Biology - Cells And DNA - Learning Points. Before the discovery of genes, Austrian monk Gregor Mendel described three laws...
Curated Video
Inheritance: Part 2
If you inherit two copies of every gene, one from each parent, how do your cells know which version to use? Biology - Cells And DNA - Learning Points. Alleles, alternative forms of genes, can be dominant or recessive. Dominant alleles...
Wonderscape
Genetic Inheritance: Why We Are Unique
Dive into the intricate world of genetic inheritance to understand how dominant and recessive alleles shape our traits, from tongue rolling abilities to eye color. Learn why siblings can inherit different traits from the same parents and...
Curated Video
Why Do Some People Look More Like Their Grandparents Than Their Parents?
Our physical appearance is significantly influenced by our genes, which are inherited from our parents, who in turn receive their genetic material from their own parents. When your genetic makeup closely mirrors that of your...
Curated Video
GCSE Biology - Why We Inherit Diseases From Our Family - Polydactyly & Cystic Fibrosis #75
In this video we take a look at the conditions polydactyly and cystic fibrosis, and use genetic diagrams to see how they can be inherited.
Curated Video
GCSE Biology - Selective Breeding #77
Selective breeding is the process of choosing the best animals and plants and breeding them together, in the hope of getting even better offspring. Learn how it all works and why we do it in this video!
Curated Video
GCSE Biology - Genetic Diagrams #73
To show how inheritance works we can use genetic diagrams and punnet squares. This video explores two examples to demonstrate everything you need know about them!
Curated Video
GCSE Biology - DNA Part 2 - Alleles / Dominant / Heterozygous / Phenotypes and more! #64
There are load of terms to know about DNA, and in this video we explain all the main ones - genes, alleles, homozygous and heterozygous, dominant and recessive, genotype and phenotype. Along the way we'll see how genes and inheritance...
Curated Video
Master Dihybrid Crosses: The Step-by-Step Guide to Punnett Squares & Genetic Ratios
In this detailed video, we'll walk you through dihybrid crosses, Punnett squares, and the often-discussed 9:3:3:1 ratio. Get ready to dive deep into the world of genetics! This step-by-step guide to dihybrid crosses using Punnett squares...
Curated Video
Punnett Square Example - Dihybrid Cross
A video explaining and illustrating how to determine the gametes from a two trait cross and how to find the genotype and phenotype ratio from a two trait cross.
Curated Video
Alternate Genetic Crosses
“Alternate Genetic Crosses” models incomplete, codominance, and multiple allele genetic crosses in order to determine the genotype and phenotype of the possible offspring.
Curated Video
What Are Genes?
A video entitled “What Are Genes?” which introduces the concept of heredity, or the combination of genetic traits.
Curated Video
Transferring Traits
“Transferring Traits” introduces the concepts of heredity and genetic traits, with a focus on Gregor Mendel’s pioneering work in the field of genetics.
Curated Video
Genotype, Phenotype and Punnett Squares Made EASY!
Ever wondered how traits are inherited? How can we predict the height of a pea plant or the color of a flower? Dive into the exciting world of genetics with me, Leslie Samuel, as we simplify complex concepts of genotype, phenotype, and...
Curated Video
Mendelian Genetics and the Laws of Heredity
Join us as we dive into the fascinating world of genetics, guided by the Father of Genetics himself, Gregor Mendel. We'll explore the laws of heredity Mendel formulated from his groundbreaking experiments with pea plants and learn how...