Myotonic dystrophy is which type of trait?

Which disorder is related to the quantitative amount of hemoglobin?

If a color-blind man marries a woman who is homozygous normal for this trait,what will be the genotype of their children?

Assertion : Persons suffering from haemophilia fail to produce blood clotting factor $VIII$.
Reason : Prothrombin producing platelets in such persons are found in very low concentration.

Albinism is caused by an autosomal recessive disorder. $A$ couple has their first child who is an albino (having abnormal skin pigmentation). What is the probability that their second child will also be an albino (in $\%$)?

Knowing that albinism is determined by a recessive gene in humans,the presence of albinism in children born to a couple proves that: