Carrier parents have a 50% chance of passing on their abnormal gene to each offspring.
(Carrier parents; have; a 50% chance of passing on their abnormal gene to each offspring) Context(Carrier parents have,List([0, 20))):(Carrier parents; have of passing on; their abnormal gene; to each offspring)
Carrier parents have,List([0, 20))
Carrier parents Carrier parents
have have of passing on
a 50% chance of passing on their abnormal gene to each offspring
their abnormal gene to each offspring