Final answer:
The order of genes in the human globin gene family on the chromosome corresponds to the order of expression during development: embryonic, fetal, and adult.
Step-by-step explanation:
In the human globin gene family, the order of genes on the chromosome corresponds to the order of expression during development.
The genes are arranged in clusters on every chromosome
. The order of expression is as follows: embryonic, fetal, and adult.
For example, the hemoglobin genes encode different types of chains, such as alpha (a), beta (ß), gamma (y), and delta (8). During embryonic development, genes for embryonic hemoglobin are expressed.
As development progresses to the fetal stage, fetal hemoglobin genes are expressed.
Finally, during adulthood, adult hemoglobin genes are expressed.
It is important to note that there are variations in the types of chains and their combinations, resulting in different types of hemoglobin found in humans.