Tay-Sachs is a lethal inherited disease that causes the brain of the infant to
deteriorate. Parents who are heterozygous for Tay-Sachs do not show signs of the disorder, but can pass the disorder to their child. Parents who do not have the disease, but can pass it on are called . (Codominant/polygenic/carriers/sex- linked)

Carriers

Explanation:

Since the Parents are heterozygous for the Tay-Sachs disease but don't have it, it's called a carrier. Hoped this helped :)

Tay-Sachs is a lethal inherited disease that causes the brain of the infant to

deteriorate. Parents who are heterozygous for Tay-Sachs do not show signs of the disorder, but can pass the disorder to their child. Parents who do not have the disease, but can pass it on are called CARRIERS

Explanation:

Carriers are type of people that posses the traits or gene but it is not dominant which makes it not to be expressed phenotypically but it is passed across from parents to offspring

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.