First slide

Inheritance of One Gene

Question

Statement A: Alternative forms of genes account for variations in inherited characters.
Statement B: Alternative forms of genes arise due to slight change in the nucleotide sequence.

Easy

A

Statement A is correct, Statement B is incorrect
B

Statement B is correct, Statement A is incorrect
C

Both statement A and Statement B are correct
D

Both statement A and Statement B are incorrect.

Solution

Alternative forms of genes account for variations in inherited characters. The gene for flower color in pea plants, for example, exists in two versions, one for purple flowers and the other for white flowers. These alternative versions of a gene are called alleles.
Alternative versions of genes arise due to slight variations in its nucleotide sequence. This variation in information content can affect the function of the encoded protein and thus the phenotype of the organism.

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