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4.Principles of Inheritance and Variation
normal
With the help of an example, differentiate between incomplete dominance and co dominance.
Option A
Option B
Option C
Option D
Solution
When experiments on peas were repeated using other traits in other plants, it was found that sometimes the $F_1$ had a phenotype that did not resemble either of the two parents and was in between the two
$F_1$ resembled either of the two parents (dominance) or was in-between (incomplete dominance). But, in the case of co-dominance the $F_1$ generation resembles both parents.
| Allele from Parent $1$ | Allele from Parent $2$ | Genotype of offspring | Blood types of offspring |
| ${I^A}$ | ${I^A}$ | ${I^A}$ ${I^A}$ | $A$ |
| ${I^A}$ | ${I^B}$ | ${I^A}$ ${I^B}$ | $AB$ |
| ${I^A}$ | $i$ | ${I^A}$ $i$ | $A$ |
| ${I^B}$ | ${I^A}$ | ${I^A}$ ${I^B}$ | $AB$ |
| ${I^B}$ | ${I^B}$ | ${I^B}$ ${I^B}$ | $B$ |
| ${I^B}$ | $i$ | ${I^B}$ $i$ | $B$ |
| $i$ | $i$ | $i$ $i$ | $O$ |
Standard 12
Biology
