How did covid-19 develop? Include your sources.

https://www. uchicagomedicine. org/forefront/prevention-and-screen ing-articles/wuhan-coronavirus

Here's a source you can use.

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?