They can be used to repair damaged cells, as well as treat diseases.
Allergies are caused by environmental factors known as allergens like dust, pollen, ceramics etc.
Cystic fibrosis is an autosomal recessive genetic disorder.
Common cold is caused by viruses i.e. pathogen.
Skin cancer is caused due to genetic factors like mutations & also, due to exposure to UV radiation.
Malaria is caused by a pathogen named as Plasmodium. Female Anopheles mosquito is the carrier of plasmodium. The plasmodium completes half of its life cycle in Female Anopheles mosquito & its rest of the life cycle is completed in human body.
<span>The 1960 Chile earthquake was a magnitude 9.5 the largest earthquake ever recorded!</span>
The Afrikaners are an example of a founder effect that occurs when population and the random decrease in genetic variation is an example of genetic drift.
Explanation:
When some individuals from a population move to form a new colony, this phenomenon is called founder effect as in case of Afrikaners. The small population or group of individuals forming a new colony may not exhibit the full genetic diversity of the population they were once the part.
The alleles would get expressed in different frequencies than it would have in original population.
There are chances that some alleles are lost or missing also. The new colony formed has small population so chances of genetic drift are very strong.
Genetic drift does not depend upon the benefit or harmful effect of the alleles as it occurs merely by chance sampling. The small population of Afrikaners felt the effect of genetic variation hence strong genetic drift is seen in them.
Lets say the plant that formed nodules is Species A, and the one who didn't is Species B.
If the nitrogen is concentrated in one area but at a low concentration, then Species A may have formed nodules because it is closer to the concentrated nitrogen. Species B didn't because the nitrogen that is active is being taken by Species A.
