What invention was essential for the discovery of germs?
a) the optical microscope
b) the electron microscope
c) the binocular microscope
d) the magnifying glass

Louis Pasteur published his Germ Theory in 1861. He developed it using his microscope and stated that ‘germs’ (microbes) caused disease and illness. The theories in place before Pasteur’s discovery were the theories of spontaneous generation (germs are generated by decay) and miasmas (bad air).

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )