Help please this is about dna in biology

How does the study of genetic disorders such as pku biologists understand normal alleles?

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?