Enzymes are part of the chemical digestion process. The function is to break down macro molecules. Amylase is a digestive enzyme secreted in the mouth and by the pancreas and is responsible for breaking down starch.
Enzymatic digestion comes under <u>chemical digestion</u><u> </u><u>not mechanical.</u> It is <u>chewing, crushing and grinding of food (bolus) by teeth</u> which comes under <u>mechanical digestion.</u> Digestion simply means <u>break down of large & complex macro molecules into smaller & simpler ones. </u>This breakdown is necessary because only smaller/simpler molecules can enter blood vessels. The digestion of food starts from the mouth itself and <u>amylase which is secreted by pancreas </u>is the first enzyme which acts on the starch (carbohydrate) component of food. By the action of amylase, starch which is a polysaccharide (complex bio molecule) is converted into simpler molecules like maltose which is a disaccharide.
I believe it's called a sex-linked trait, if I'm remembering correctly. This is because men do not have an X chromosome, therefore it would be linked to females.