A monohybrid cross involves ________ pair(s) of contrasting characters.
only one
only one is correct.
A monohybrid cross, first demonstrated by Gregor Mendel on garden pea plants, is a genetic cross between two individuals that differ in only one pair of contrasting characters — for example tall versus dwarf, or round versus wrinkled seeds. The prefix 'mono' itself means 'one', which fixes the number of character pairs considered.
Such a cross produces the classic 3 : 1 phenotypic ratio in the F2 generation, from which Mendel deduced the Law of Segregation. A dihybrid cross considers two pairs of characters and a trihybrid considers three; eight pairs would be a polyhybrid cross. Only 'one' matches the monohybrid definition.
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Important Questions from Genetics and Evolution
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Pair of genes that occupy a specific location on a particular chromosome and control the same trait is termed as _________.
