A C - only male expressed the disorder and only females carried the disease. This is typical of a special type of diseases where only females are and can be carriers and only men can and are affected. There aren't many diseases like this but they do exist. 
        
             
        
        
        
Answer:
B I think 
Explanation:
there are 2 directions and in each direction there are 2 working in it
 
        
             
        
        
        
Answer:
A germline mutation, or germinal mutation, is any detectable variation within germ cells (cells that, when fully developed, become sperm and ovum). Mutations in these cells are the only mutations that can be passed on to offspring, when either a mutated sperm or oocyte come together to form a zygote.
Explanation:
 
        
             
        
        
        
The important thing to identify the degrees of lightness to darkness in each level.
Hope this helps you.