They are both renewable resources
Added to make certain structure easier to see.
The answer is a gene.
During an embryogenesis, cells divide to form tissues and organs. In some moment, a mutation could occur in a gene in some cell. The copies of those genes molecules will be mutant copies and will be present only in that cell line. That is why pigment is absent only in specific places.
Answer:
A homologous chromosome pertains to one of a pair of chromosomes with the same gene sequence, loci, chromosomal length, and centro-mere location. A homologous pair consists of one paternal and one maternal chromosome. That is because the sex chromosomes, X and Y, in males are not homologous.
Explanation: