Explain Mendel's law of independent assortment by taking a suitable example. (b) How did Morgan show the deviation in inheritance pattern Drosophila with respect to this law?
Answers
Answer -
In the 1860s, a monk named Gregor Mendel discovered many of the principles that govern heredity. One of these principles, now known as Mendel's law of independent assortment, states that allele pairs separate during the formation of gametes. This means that traits are transmitted to offspring independently of one another.
B) Answer -
Morgan however observed the deviation in inheritance pattern in Drosophila with regard to this law : He observed that in Drosophila the F2 ratio in a dihybrid cross deviates significantly from 9 : 3 : 3 : 1 ratio. This is because the genes were linked. They are located on the same chromosome and therefore inherited together. Because of this the parental types observed in F2 generation were greater than the new recombinations. Linkage was not observed by Mendel because the characters which he had chosen were not linked as their genes are located on different chromosome and when on the same chromosome they were quite apart.
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