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.

It basically started at a shop in Wuhan and it had the DNA of a snake and a rat  and developed to affect mammals including humans currently it has no antidote or vaccine.

Explanation:

MARK BRAINLIEST PLZ

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.