Both sickle cell anaemia and Huntington's chorea are

The given pedigree chart shows which type of inheritance?

Identify the given pedigree analysis.

Assertion: Phenylketonuria is a recessive hereditary disease caused by the body's failure to oxidize the amino acid phenylalanine to tyrosine due to a defective enzyme.
Reason: It results in the presence of phenylalanine acid in urine.

$A$ husband and wife have normal vision,but the fathers of both of them were colour blind. What is the probability of their first daughter being colour blind (in $\%$)?

$A$ man and a woman do not show any apparent genetic disease. They have $7$ children ($2$ daughters and $5$ sons). Three sons suffer from the given disease,but none of the daughters are affected. Which pattern of inheritance can you suggest for this disease?