Explanation:
Your stomach might get upset early on if you have liver disease. As the disease and damage to your liver go on, raised toxin levels can make this worse. Lingering nausea or throwing up often are a sign of liver problems. If your liver is failing, you also may have blood in your vomit or poop. and plus it get really hard to digest the food as it secretes bile juice
 
        
             
        
        
        
The extra X chromosome is received from mother.
<h3><u>Explanation</u>:</h3>
Klinefelter's syndrome is the condition of chromosomal aberration where the person has an extra X chromosome. This means the genotype of the person is 44+XXY and the total chromosome number is 47. This condition is achieved due to inappropriate meiotic division and one of the sperm or ovum has the an extra X chromosome.
Here both the parents are normal in terms of colour vision. So the father cannot have the gene of colour blindness because if it was present, then father would have been colour blind because he has only one X chromosome per cell. So its present in mother who is heterozygous in terms of colour blind gene. So the extra X chromosome also came from her which made the presence of two defective X chromosomes in the offspring and made it colour blind. 
 
        
             
        
        
        
Answer:
I think it is C if I am wrong i am srry
 
        
             
        
        
        
Answer:
The three mains in the process of DNA replication are 1 initiation 2 elongation 3 termination.
Explanation:
Enzymes those function during initiation
1 Helicase.
2 single strand binding protein.
3 Topoisomerase.
Enzymes those function during elongation 
a DNA polymerase alpha
b  DNA polymerase delta
c  DNA polymerase epsilon 
Enzymes those function during termination
1  Replication protein A 
2 Replication factor C