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Refer the given statements (i) Incomplete or mosaic inheritance is an example of pre-Mendelian concept of blending inheritance (ii) Test cross is a special type of back cross (iii) Chromosomal aberrations are commonly observed in cancer cells (iv) Thalassaemia is a Mendelian disorder Which of the above statements are correct ?A. (i) and (ii) onlyB. (ii),(iii) and (iv)C. (ii) and (iv) onlyD. (i) and (iv) only |
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Answer» Correct Answer - B Incomplete (partial or mosaic) dominance is the phenomenon where none of the two contrasting alleles or factors is diminant. The expression of the character in a hybrid or `F_(1)` individual is intermediate or a fine mixture of the expression of the two factor (as found in homozygous state). Incomplete or mosaic inheritance is not an example of pre-mendelian concept of blending inheritance because the parental types reappear in the `F_(2)` generation. |
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