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Question
The first genetic map was created by _________ and the unit of the genetic mapping is __________ .
The first genetic map was created by _________ and the unit of the genetic mapping is __________ .
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Solution
The correct option is C Alfred Sturtevant, centimorgan
Chromosome maps/ genetic maps were first discovered by Alfred Sturtevant (1891-1970), an American geneticist and also a student of T.H. Morgan. Along with Morgan he conducted experiments on the fruit fly and led the foundation of modern biology by mapping the relative location of a series of genes on a chromosome. The frequency of recombination between gene pairs on the same chromosome is a measure of the distance between genes and their position on the chromosome. The unit that is used to measure the distance between the genes is centimorgan (cM), in honour of Morgan’s contribution. A centimorgan is a unit of genetic distance that represents 1% recombination during meiosis. Sturtevant realized that if a given chromosome is of the same length in all flies, and if the genes have a specific location on it, then the distance between any two genes should be a fixed number and that can measure how often they are inherited together.
William Bateson, an English biologist who first suggested and used the word “genetics” for the study of inheritance and variation and was the chief populariser of the ideas of Mendel.
Gregor Johann Mendel, the “father of genetics” founded the science of genetics. He worked with seven characteristics of 14 varieties of the garden the pea plants (Pisum sativum) which led him to the discovery of the Laws of inheritance which later came to be known as Mendel’s Laws of Inheritance.
Chromosome maps/ genetic maps were first discovered by Alfred Sturtevant (1891-1970), an American geneticist and also a student of T.H. Morgan. Along with Morgan he conducted experiments on the fruit fly and led the foundation of modern biology by mapping the relative location of a series of genes on a chromosome. The frequency of recombination between gene pairs on the same chromosome is a measure of the distance between genes and their position on the chromosome. The unit that is used to measure the distance between the genes is centimorgan (cM), in honour of Morgan’s contribution. A centimorgan is a unit of genetic distance that represents 1% recombination during meiosis. Sturtevant realized that if a given chromosome is of the same length in all flies, and if the genes have a specific location on it, then the distance between any two genes should be a fixed number and that can measure how often they are inherited together.
William Bateson, an English biologist who first suggested and used the word “genetics” for the study of inheritance and variation and was the chief populariser of the ideas of Mendel.
Gregor Johann Mendel, the “father of genetics” founded the science of genetics. He worked with seven characteristics of 14 varieties of the garden the pea plants (Pisum sativum) which led him to the discovery of the Laws of inheritance which later came to be known as Mendel’s Laws of Inheritance.
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