The basis of combinational variability is the sexual reproduction of organisms, resulting in a huge variety of genotypes. Almost unlimited sources of genetic variation are three processes: independent homologous chromosomes, mutual exchange of regions of homologous chromosomes, or crossing over, a random combination of gametes during fertilization.
The flower night beauty has a red gene for the petals A, and a white gene for a. Aa’s body has pink colored petals. Thus, the night beauty does not have a pink gene, pink color occurs when a combination of red and white gene.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.