Well the seminar was fantastic! Claudia Orlandi did a wonderful presentation, and hands on demonstration. I think Cheyenne was disappointed though, she had a different idea on how we should have spent our afternoon
Instead of just telling you about how good the seminar was I thought I would do a series on what I learned starting with the basics of genetics. I find the whole world of genes and how animals are put together absolutely fascinating, so here goes my first post of many, Genetics 101.
The father of genetics was Gregor Mendel through his work with plants and peas he discovered that traits don’t blend, you can find more information on him here.
Every dog has 78 chromosomes or 39 pairs in the cell of the nucleus, they are rod shaped structures. The 39th pair are the sex chromosomes and the other 38 pair are called autosomes; these determine things like the body structure and temperament. Along these chromosomes are the genes and they also come in pairs, one gene from each parent goes into making the puppy and the genes in each puppy of a litter are different.
Each pair of chromosomes are called homologous and the place a gene is located on the chromosome is called locus. There are dominant genes and recessive genes, when genes are the same either both dominant or both recessive they are called homozygous and are considered pure for a trait. Gene pairs that have one dominant and one recessive are called heterozygous, these are considered not pure. The dominant gene overrules the activity of the recessive gene.
Phenotype is the external appearance of the dog and genotype is the genetic make up of the dog. You can not tell by the phenotype what the genotype is because of the hidden recessive genes. So I will stop here and show you a few pictures from our day…
Cheyenne being examined
Our friend Chemmy
Maybe the ducks are over there…what no ducks
Watching the dogs
Hey where did everyone go
Chemmy and her mom
Cheyenne loves her Uncle Dave
So that’s it for today, stay tuned for more Genetics 101 in the weeks to come.