The afrikaner population of dutch settlers in south africa is descended mainly from a few colonists. today, the afrikaner popula
tion has an unusually high frequency of the gene that causes huntington's disease. huntington's disease is an autosomal dominant disease and only one allele is needed for the disease (hh, hh). the afrikaners are an example of a founder effect. it is also an example of genetic drift. how is the founder effect related to the concept of genetic drift? a.reduced genetic variation of this small population means that the population may not be able to adapt to new selection pressures.
b.in a small population, the more advantageous trait becomes more common. if this continues, eventually, all individuals in the population will have huntington's disease.
c.the small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for huntington's disease.
d.there are three sources of genetic variation: gene flow, sexual reproduction and mutation. in the case of the afrikaners, once the settlers arrived in africa, these three sources had little impact on the gene pool and variation.
C. The small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for Huntington's disease.
Explanation:The small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for Huntington's disease. Genetic drift, along with natural selection, mutation, and migration, is one of the basic mechanisms of evolution. In this case, it was chance that the settlers all carried the allele for Huntington's disease.
Its C. <span>the small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for huntington's disease.</span>
<span>ACL
A popular amongst the most well-known knee injuries is the Anterior Cruciate Ligament (ACL) sprain or tear. The ACL is tissue that associates the thighbone to the shinbone, at the knee. Most ACL wounds are often sport related.</span>
In which class of elements is there a greater range of properties, the metals or the nonmetals? Give an example to support your answer. Non-metals have greater range of properties given that they exist as solids, liquids and gases. And also that they can polymerize, crystallize and form organic compounds.
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
