Answer:
An autosomal dominant gene is one that occurs on an autosomal (non-sex determining) chromosome. As it is dominant, the phenotype it gives will be expressed even if the gene is heterozygous.  
The chances of an autosomal dominant disorder being inherited are 50% if one parent is heterozygous (NL) for the mutant gene and the other is homozygous for the normal (NN), or 'wild-type', gene. This is because the offspring will always inherit a normal gene from the parent carrying the wild-type genes, and will have a 50% chance of inheriting the mutant gene from the other parent. If the mutant gene is inherited, the offspring will be heterozygous for the mutant gene, and will suffer from the disorder. If the parent with the disorder is homozygous for the gene, the offspring produced from mating with an unaffected parent will always have the disorder.  
Explanation:
 
        
             
        
        
        
Your friend will talk about the definition of evolutionary medicine, and there by understanding the health and diseases
Explanation:
- Evolutionary medicine is the understanding the health and diseases using the evolutionary theory
- Evolutionary theory gives an idea of the heritable and morphological changes in the organism. 
- Today, the field of research on evolutionary medicine is advanced to the molecular and psychological mechanism of health and diseases. 
- Hence, your friend will talk about the evolutionary understanding of the health and diseases from the lens of the evolution of species. To create an understanding of the evolutionary medicines there need to ab understanding of the heath and diseases of previous ages.
 
        
             
        
        
        
The answer is B Have a great day sweetie
        
             
        
        
        
B: A mutation in one of G5W's parents, during gamete formation, created an X-linked dominant disease allele.
You need to analyze the sex gametes.
Boys are XY 
Girls are XX
If you have an X-linked dominant disease you need only one affected X gamete to have the disease.
The mother has XX' where X' is de affected and reproduce with a healthy man XY and breed unhealthy boys, but because of the heterozygous gametes you could also have healthy ones XX and XY