Turn on/off the embedded sound - Mendel's Mix, the composer's mix.

Mendel's Mix

for orchestra and conductor by Jon Rose

The 4 nucleotide bases Adenine (A), Guanine (G), Thymine (T) and Cytosine(C), that make up DNA are replicated in the score by the pitches C,B,Eb and F#. DNA sequences provide the pitch order, durations and rhythmic content. Since DNA is measured according to base pairs, I have divided the orchestra up into pairs (duos) with the exception of the string section, solo double bass, and organ. Occasionally pitch mutations occur.

1. Mendel's Mix 1. (Law of Independent Assortment).

In the first and main movement, each pair plays their material at their own speed, giving each DNA sequence its own independence. The unique tempo for each pair is indicated on the score. The conductor (or visitor to this page) is critical to the success of this movement, stopping, pausing, and restarting any pair of the ‘mix’ and indicating a variety of dynamics. As with much improvisation, any combination of trios is a satisfying medium, but the piece will work with any grouping or even everyone independently assorting. The composer's mix is available at the top of this page. In concert, the pairs should be situated around the edges of the concert hall, with strings, percussion, and organ onstage.

2. Mendel Unmixed (Law of Segregation).

3. Mendel Remixed (Law of Dominance).

Gregor Mendel - the father of genetics (1822- 1884)



Mendel's Mix: Law of Independent Assortment, bassoon and contra bass bassoon - Petr Hlavatý and Jiří Jakubec


Mendel's Mix: Law of Independent Assortment, flute and piccolo - Markéta Soldaánová and Eva Bergerová


Mendel's Mix: Law of Independent Assortment, double bass - Michal Pokorný


Mendel's Mix: Law of Independent Assortment, Cimbalom and vibraphone - Jana Schejbalová and Martin Švec


Mendel's Mix: Law of Independent Assortment, Organ - Dominik Susteck


Mendel's Mix: Law of Independent Assortment, Trumpets - Jozef Zimka and David Pollák


Mendel's Mix: Law of Independent Assortment, Percussion - Petr Hladík and Martin Švec


Mendel's Mix: Law of Independent Assortment, French Horns - Antonín Kolář and Miloš Kovařík


Mendel's Mix: Law of Independent Assortment, Piano and Harp - Stanislav Slavíček and Pavla Kopecká


Mendel's Mix: Law of Independent Assortment, Strings - (violin) Lukáš Mik, Dennis Schneiderka, Karel Mitáš, Marie Pšenicová, Antonina Tyshko, Filip Kostelecký, Jana Procházková, Kristýna Jungová; (viola) Stanislav vacek, Petr Pšenica, Josef Janda, Michaela Bartošová; (violoncello) Katarína Madariová, Michal Greco, Rudolf Mrazík; (doublebass) Michal Pokorný, Jiří Šícha.


Mendel's Mix: Law of Independent Assortment, The Strings Coda


Mendel Unmixed and Re-mixed: 2nd and 3rd movements played by full orchestra (rehearsal only)

The performance of Mendel's Mix finally took place on 4 November 2021 at Besedni dům Brno (the historic home town of Mendel). It was performed by The Brno Contemporary Orchestra with their replacement conductor Jan Krejcik (the instigator of Mendel's Mix and conductor of the orchestra, Pavel Šnajdr, was ill with Covid 19). My thanks to all those who took part and to Jozef Cseres who proposed the original commission. The stereo recordings used on this page were all made in rehearsal on stage and not heard in surround sound as they were in concert.

More information here and score example here.

© Music composed by Jon Rose 2020

What's New

June 2021
'Figures of Eight' - a work from 1974, updated, and given a thrilling performance by violinist Emma Roijackers.
Haarlem Lichtfabriek, Holland
May 2021
'State of Play' titles my new double album featuring duo improvisations and recent projects with a cast of great collaborators...out now!
ReR Recommended Records, London
September 2021
'Corrugations' heralds a new music series starting in Alice Springs - we just moved into a new house here big enough to hold the Rosenberg Museum and performances.
Alice Springs, Northern Territory, Australia
May - October 2021
'Whistling in the Dark' embraces a set of duets between various pied butcherbirds (from field recordings in outback Australia) and virtuosic human musicians (in home lockdown) performing transcriptions of this extraordinary avian music.
On Line Project available September
November 2021 - Premiere
'Mendel's Mix' - A commission for Brno Contemporary Orchestra. Finally after many Covid-19 delays, the work is performed. Inspired by the 'father' of genetics, Johann Gregor Mendel, and based on the structure of DNA, you can mix your own version here.
Brno, Czech Republic
Latest Stuff
director of Brno Contemporary Orchestra - Pavel Šnajdr
conductor of Mendel's Mix - Jan Krejcik
Jan Krejcik in concert
organist - Dominik Susteck
harpist - Pavla Kopecká
Mendel's Peas in the Pod
The Contemporary Orchestra Brno in rehearsal
website by jos berkers