Answer: A change in allele frequencies caused by random events
Explanation :<u>Genetic drift refers to a process which occur due to sampling error from preceding generations that lead to a change in allele frequency by chance alone within a population.</u> It is a random process which leads to large significant changes within a population over a short period of time. The rapid changes are due to increasing inbreeding coefficient s and homozygosity from the removal of alleles.
It is peculiar to a population which is synonymous with regular cycle of extinction and recolonization. Therefore, together with evolution, mutation and migration, <u>it is one of the driving mechanism of EVOLUTION.</u>
It is caused by;
Static or recurring small population sizes,
"Bottlenecks” form of population, that is drastic reduction in population size;
Repopulation from a small number of individual-FOUNDER EVENTS.
<u>Measurements of Genetic Drift
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The magnitude of genetic drift within a population depends on the effective population size for the population.This is represented as Ne. It is a theoretical number use to quantify the number of genetically distinct individuals that contribute gametes
Answer:
The Law of Dominance states that the dominant allele completely masks the presence of a recessive allele. The law of segregation states that the two alleles for each trait separate during the formation of gametes and that during the formation of new zygotes, the alleles will combine at random with other alleles. A parent gives only one allele to make a gene. The law of independent assortment says that the allele that a gene receives first has no bearing on the allele it will receive second.
Explanation:
Answer: a. True
Explanation:
This is an important definition in health and safety courses.
Answer:
The fossils that are found in the present day includes both heterotrophs and autotrophs. Those organism that can prepare their own food in the presence of sunlight, water and carbon dioxide, by the process of photosynthesis are considered as the autotrophs
Muscles are elongated cells, sizes from a couple of millimetres to about 10 centimetres in length and from 10 to 100 micrometres in width. They are joined together in tissues that may be either striated or smooth. Striated muscles are classified even further. They belong to either skeletal or cardiac muscle. Striated muscle is typically subject to conscious control, while smooth muscle is not.
