Two major types of organelle in eukaryotic cells, mitochondriaand plastids such aschloroplasts, originated as bacterial endosymbionts.
Professor Buchannan suffers from the liver disease called, cirrhosis.
Cirrhosis is a condition involving heavy scarring of the liver caused by chronic conditions and diseases, such as heavy alcoholism and hepatitis. All these chronic damages cause serious problems on the functioning of the liver. Throughout the years, professor's liver tried to repair itself from the damages and that is why the scars were formed.
So they can see if their observation is correct and to see what it would probably look like bwfore the fact into doing it.
Hope this helps plz mark as brainlist and 5 star
Answer:
At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis. In meiosis, absence of a chiasma generally results in improper chromosomal segregation and aneuploidy.
Explanation:
