You can involve some machinery in that to make it not so easy:
To give Player1 genes to Player2:
Take blood sample of Player1
Purify blood sample of Player1
Take blood sample of Player2
Purify blood sample of Player2
Put blood sample of Player1 into Antigene analyser
Put antigene analyzed sample of Player1 blood into Antigene discarder
Put Player1 antigene-less blood sample into Plasmid Extractor to extract plamids one-by-one, losing some of the progress in the process
Inject plasmids into Player2 blood
Inject Player2 blood sample into Player2
Profit
Antigene Analyser: Machine that analyses antigenes - things, that make blood groups. Takes same amount of energy as DNA Analyzer
Antigene Discarder: Machine that removes antigenes from blood, damaging injected plasmids, which is which progress goes down. Takes same amout as energy as DNA extractor and Plasmid Injector combined
Plasmid Extractor: Extracts uncommon for entity type plasmids from antigene-discarded sample. Takes same amount of energy as Cloning Machine.
You can involve some machinery in that to make it not so easy: To give Player1 genes to Player2:
Antigene Analyser: Machine that analyses antigenes - things, that make blood groups. Takes same amount of energy as DNA Analyzer Antigene Discarder: Machine that removes antigenes from blood, damaging injected plasmids, which is which progress goes down. Takes same amout as energy as DNA extractor and Plasmid Injector combined Plasmid Extractor: Extracts uncommon for entity type plasmids from antigene-discarded sample. Takes same amount of energy as Cloning Machine.