Final answer:
The statement that fraternal twins fusing to develop into one person is an example of chimerism is true. Chimerism happens when two genetically different cell populations are found in a single organism, and can occur naturally in cases such as fraternal twins.
Step-by-step explanation:
True or False. Fraternal twins fusing to develop into one person is an example of chimerism.
The statement is True. Chimerism occurs when two or more different populations of genetically distinct cells appear in one organism. In the context of twins, fraternal twins can occasionally incorporate cells from each other during development, leading to a chimera, a single organism with two distinct sets of DNA. This is different from the normal development of monozygotic (identical) twins formed when a zygote splits and more common in fraternal twins (dizygotic) where two separate eggs are released and fertilized during the same ovulatory cycle. Chimeric molecules can also be created artificially by joining genes from different species to form a new combination of DNA/proteins in a test tube.