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...
Curated Video
Blood Type Problems
What will be the blood type of the probable progenies of blood type AB and blood type O parents? Let's solve this problem in the scenarios below: What will be the phenotype from a father with heterozygous type A, and a mother with...
Curated Video
Two Point Mapping
To determine if two genes are linked, observe the variation in offspring numbers—if all genotypes occur equally, the genes are not linked. If offspring counts differ, the most frequent genotypes represent parental types, and the less...
Curated Video
Dihybrod cross Tricks
A dihybrid cross is a breeding experiment between P generation (parental generation) organisms that differ in two traits. The individuals in this type of cross are homozygous for a specific trait. Traits are characteristics that are...
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
Phenotype
The observable physical and behavioural characteristics of an organism. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
GCSE Biology - Family Trees / Family Pedigrees #74
This video covers: - What family trees are and how they work - How to use keys - The example of cystic fibrosis - How to use family trees to predict the chance of a disease being inherited Exam board specific info: AQA - Everything is...
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
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
Understanding ABO Blood Groups and Alleles
This video explains the ABO blood group system which is important for blood transfusion compatibility. The video describes the four blood types and how they are determined by the presence or absence of specific markers on red blood...
Catalyst University
Jacob's Syndrome | A Y-Chromosome Aneuploidy
This video dissects Jacob's syndrome, a benign genetic condition in which males have two Y-chromosomes (genotype XYY).
Catalyst University
Mechanism of X-Chromosome Aneuploidies [Klinefelter's, Turner's, & XXX]
In this video, we explore the mechanisms that cause thoracic outlet syndrome by looking at the relevant anatomy and structures.
Curated Video
Introduction to Genetic Diagrams for Single Gene Inheritance
This video provides an explanation of genetic diagrams and their use in studying single gene inheritance, also known as monohybrid inheritance. Using the example of superpowers inherited through a single gene, the video demonstrates how...
msvgo
Hardy-Weinberg Principle
It explains Hardy-Weinberg principle including concepts such as founder effect, bottle neck effect and Hardy-Weinberg Equilibrium.
Bizarre Beasts
The Strange Thing That Turns Grasshoppers Into Locusts
Locusts don't have to be locusts. When they grow up by themselves, they lead pretty regular, grasshopper lives. But when conditions are right, well, it’s swarming time.
Curated Video
Introduction to Punnett Squares and Genetic Inheritance Analysis
This is a tutorial video that explains what a Punnett square is and how it can be used to analyze and predict genetic inheritance. The video defines important terms such as genotype and phenotype and explains how alleles operate on a...
msvgo
Law of Dominance
It explains Mendel's concept of dominant and recessive trait and describes biochemical basis of dominance.
Catalyst University
Genetics | Dihybrid Cross (Example 2)
A second example of a dihybrid cross in which the paternal AaBb gamete is crossed with the maternal AaBb gamete (both parents are doubly heterozygotes for genes A & B)
Visual Learning Systems
Fundamentals of Genetics: Hybrid Cross
In this program Mendel's work is explored in greater detail by using probability to make predictions of the inheritance of specific traits. The use of the Punnett Square is illustrated through easy-to-understand animations. Other...
Professor Dave Explains
Regulation of Gene Expression: Operons, Epigenetics, and Transcription Factors
We learned about gene expression in biochemistry, which is comprised of transcription and translation, and referred to as the "central dogma" of molecular biology. But how is this process regulated? How does a cell know which genes to...