Britannica (анлайн) Gregor Mendel Gregor Mendel Gregor Mendel Gregor Mendel Britannica Gregor Mendel "Gregor Mendel" Gregor Mendel Gregor Mendel Gregor Mendel Gregor Mendel Gregor Mendel https://www.britannica.com/biography/Gregor-Mendel Gregor Mendel Gregor Mendel Gregor Mendel Gregor Mendel Gregor Mendel’s pioneering work Gregor Mendel Gregor Mendel Happy Birthday Gregor Mendel https://www.britannica.com/biography/Gregor-Mendel