Learn exactly what these different terms mean, that you will come across in genetics and cell division: Gamete, Chromosome, Gene, Allele, Dominant, Recessive, Homozygous, Heterozygous, Genotype, Phenotype, Haploid & Diploid

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)

A brief discussion on Mendel's law of segregation followed by an in-depth Punnet square (monohybrid cross) example.<br/>

X-chromosome inactivation in various sex chromosome genotypes (XX, XY, XXY, XXX, XO) and resulting Barr bodies; the Lyon hypothesis; the proposed mechanism of Calico cats

We've all seen pictures of chromosomes, and we know that they contain DNA. But how do we get from the double helix of DNA to the X-looking shape of a chromosome? Is it just DNA, or are there other things in there? How much DNA is in each...

CREDITS Animation & Design: Waldi Apollis Narration: Dale Bennett Script: Lucy Billings Look at these baby animals. You will have immediately observed how cute and fluffy they are but you will also have noticed that they are different -...

In this video we are now going to look at codominance. You need to understand the difference between genotype and phenotype. The genotype is the set of genes. The phenotype are the physical characteristics that are coded for by the...

Imagine you’ve been involved in an accident. You’re bleeding and are rushed to the hospital. Thankfully you’re given a blood transfusion, to replace your lost blood. But you can’t just have blood from any old donor... In fact, when...

For all of human history, we've been aware of heredity. Children look like their parents. But why? When Gregor Mendel pioneered the field of genetics, he began to try to answer that question, and now that we know about chromosomes, all...

We all know that DNA is the molecule of heredity, but we didn't always know that. It had to be demonstrated empirically. As it happens, some of the first evidence put forth had to do with genes found on the X-chromosome of fruit flies,...

Learn exactly what these different terms mean, that you will come across in genetics and cell division: Gamete, Chromosome, Gene, Allele, Dominant, Recessive, Homozygous, Heterozygous, Genotype, Phenotype, Haploid & Diploid

This girl has six fingers on her left hand. She has a condition called polydactyly, which causes extra fingers or toes. Her father and grandmother as well as some of her cousins also have the condition. This should give you a clue about...