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yes parents can pass ,mental disorders but it is just as common for them to develop without a genetic link. Just like the physical it depends on how they are raised( what level of nature they receive)

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no parents do not cause everything in a child's appearance it also depend on how a child is raised (what they eat how they exercise)

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OCD is one of the few mental illnesses that is not researched often in a genetic field it has been shown thorough out that it is possible that a obsessive gene can be passed through a family. it is a very dominate gene which means it can travel through generations. Some people can develop the disorder through a traumatic event in their lives. Many people develop the disorder when they are unable to control the stress in their lives.

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Scientists believe that many different genes contribute to an increased risk of schizophrenia, but that no single gene causes the disorder by itself. ... Research into various genes that are related to schizophrenia is ongoing, so it is not yet possible to use genetic information to predict who will develop the disease. so typically it is caused by a imbalance in the brain but not an imbalance that parents cause.

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As with height, there are multiple genes affecting human weight. One in particular, however, is FTO. One person with two copies of the ‘big’ FTO allele is on average 3 kg heavier than a similar person with no copies.

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depression is one of the mental disorders that is easiest developed through genetics. Some people can develop it through a rough time in the lives but this is what is called "situation depression" which means a event in there lives had been so severe that it has caused depression disorder. most people have depression and discover it around the age of 13 to about 15 because at this point that part of their brains are fully developed and the chemical imbalance shows that the reason for anti depressants is to balance that part of there brain.

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Autism is something that is not always caused by a genetic passing. it is shown that people with down syndrome and Aspergers are born with autism such as these develop it in the womb by a lack of competition of the growth if the brain. Now a form of autism such as ADD,ADHD, and CDD these can be the same cases but most of the time it is reiterated through genetics.

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The 2 genetics that contribute the same amount is hair color and skin color. At least eight genes affect melanin production, and hence skin colour. A study of 118 such genes found eight associated with differences in skin colour, all linked to the enzymatic pathway of melanin synthesis. Notably, in different populations different combinations of alleles showed evidence of positive selection – more rapid genetic change than expected by chance.

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hair color is one of the few genes that is almost completely reliant of a Parents genes for example People who have red hair have  with two inactive alleles of the melanocortin 1 receptor (MC1R) gene which give the the classic  ‘Celtic’ red hair and pale skin appearance. So that means that people rely on there parents hair color almost completely for the color of theirs. And hair colcr is one of the only genes that uses genes directly from the parent  instead of attaching to past genes from aunts or great grandparents.

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Most present day cases of blue eyes come  from genetic changes in the HERC2 gene that occurred about 6,000 to 10,000 years ago during the Stone age. It is not that easy to tell a person’s eye colour from their DNA. In 2009 geneticists found they had to look at six different genomic regions and could still only predict with 90 per cent accuracy whether a person had blue or brown eyes. so all of that basically means that genetics in the eye color regin are very cloudy adn unsure unlike hair or skin color eye color isnt always determined by your parent's DNA

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One of the largest questions a parent asks when having a child is "will my problems show in them?" that's what researchers are looking for is weather a parent's mental problems could possibly show in a child and how prominently would they.
question: can parents pass on mental disorders.

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There area lot of questions that surround genetics. most are about how a parent is going to effect there child's physical appearance.
Question: do parents dictate everything in their child's apprentice as a baby?