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Yalemtsehay Mekonnen (born 30 May 1955) is an Ethiopian physiologist and pharmacologist who specializes in the use and safety of medicinal plants. In 2009, she became the first woman in Ethiopia to become a full professor. She is Professor of Cell & Human Physiology at Addis Ababa University (AAU).
This distinctive Eurasian admixture appears to have occurred over at least three time periods with ancient admixture in central west Africa (e.g., Yoruba from Nigeria) occurring between ~7.5 and 10.5 kya, older admixture in east Africa (e.g., Ethiopia) occurring between ~2.4 and 3.2 kya and more recent admixture between ~0.15 and 1.5 kya in ...
The genotype of an organism is its complete set of genetic material. [1] Genotype can also be used to refer to the alleles or variants an individual carries in a particular gene or genetic location. [2]
Classical genetics is often referred to as the oldest form of genetics, and began with Gregor Mendel's experiments that formulated and defined a fundamental biological concept known as Mendelian inheritance. Mendelian inheritance is the process in which genes and traits are passed from a set of parents to their offspring.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Science of genes, heredity, and variation in living organisms This article is about the general scientific term. For the scientific journal, see Genetics (journal). For a more accessible and less technical introduction to this topic, see Introduction to genetics. For the Meghan Trainor ...
In terms of genetics, this is called an increase in allele frequency. Alleles become more or less common either by chance in a process called genetic drift or by natural selection . [ 13 ] In natural selection, if an allele makes it more likely for an organism to survive and reproduce, then over time this allele becomes more common.
The history of genetics dates from the classical era with contributions by Pythagoras, Hippocrates, Aristotle, Epicurus, and others. Modern genetics began with the work of the Augustinian friar Gregor Johann Mendel .
Multiple choice questions lend themselves to the development of objective assessment items, but without author training, questions can be subjective in nature. Because this style of test does not require a teacher to interpret answers, test-takers are graded purely on their selections, creating a lower likelihood of teacher bias in the results. [8]