Color blindness is a recessive x-linked trait in humans. In a family where the mother is color-blind, and the father is normal, the probability of their having a color-blind son is 100%.
Color blindness is a recessive x chromosome liked recessive disease which is more prone in males than in females. As the mother is color-blind she has both the alleles of colorblindness while the father is normal with both x chromosome and y chromosome normal.
So if the parents have a boy, he will always receive an x chromosome with colorblindness gene from the mother and a normal y chromosome from the father always. Thus, the probability of having a colorblind boy will be 100%.
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Based on research, microbes have been recently associated with the following four diseases that were once considered noninfectious:
- gastric ulcers
- multiple sclerosis
- cancer
- diabetes
<h3>What are microbes?</h3>
Microbes refers to microscopic organisms, that is organisms which can not be seen with the ordinary eye but with the aid of a microscope.
Microbes consists of the following organisms:
- bacteria
- fungi
- protozoa
- viruses
Some microbes are not harmful while many other microbes are harmful and are known to be the causative organisms for many diseases.
The diseases that are caused by microbes can be passed from one person to another and are known as infectious diseases.
However, recent research have linked microbes to some diseases such as gastric ulcer, multiple sclerosis, cancer, and diabetes which were once considered non-infectious.
Example are given below;
- gastric ulcer caused by <em>Helicobacter pylori</em>
- Multiple sclerosis caused by Epstein-Barr virus
- Cancer caused by human papilloma viruses, hepatitis B and C viruses
- Diabetes caused by E. coli and Candida spp.
In conclusion, microbes cause infectious diseases.
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Note that the complete question is given below as:
Based on research, microbes have been recently associated with which four of the following diseases that were once considered noninfectious?
muscular dystrophy
multiple scleriosis
diabetes
cystic fibrosis
gastric ulcer
cancer
gastric ulcers
multiple scleriosuis
cancer
diabetes
