This is yet under the rigorous study of scientist and there was two hypothesis considered between the relationship of thick mucus and chloride ions. However, in cystic fibrosis patients, one thing is common, there is an imbalance of chloride ions in epithelial cells. The imbalance of chloride postulated are the high concentration of chloride inside or outside the epithelial cells. Overall, there is a disruption of chloride ion flow which also disrupts the flow of water in cellular osmosis.
Answer:
<h2>Autosomal dominant</h2>
Explanation:
As given here that;
A trait appears equally in both males and female, and offspring can inherit the trait both from father and mother, it indicates that this trait is not sex limited or sex linked.
And its also given that all effected individuals have at least one affected parent.
So lets parents as
A*a and A*a
so offspring are AA, Aa, Aa and aa.
If it is dominant trait, 3 out of 4 offspring are affected.
If it is recessive then 1 out of 4 offspring is affected, but here both the parents are unaffected, so it is autosomal dominant trait.
example 2; cross between aa× Aa
offspring : Aa, Aa, aa, aa
3. AA× aa
Aa, Aa...
4. AA× Aa.
AA ,Aa, AA, Aa
