| Explain the following terms with example. |
| (i) Codominance |
| (ii) Incomplete dominance |
Answer:
(i) Codominance: It is the phenomenon of two different alleles of the same gene lacking dominance-recessive relationship and expressing their effect simultaneously in the heterozygote.
Example: 'AB' type blood group is possible when allele 'A' and 'B' come together and express their effect in\[{{F}_{1}}\]-generation.
(ii) Incomplete dominance: It is the phenomenon where dominant allele do not completely express itself.
Example, In Mirabili sjalapa (four O' clock) & Antirrhinum majus (Snapdragon or dog flower), there are two types of flower colour in pure state-red & white. When the two types of plants are crossed the hybrid or plants of \[{{F}_{1}}\]generation have pink flowers. If the latter are selfed, the plants of\[{{F}_{2}}\] generation are of three types-red, pink & white flowered in the ratio of 1:2:1.
Genotypic ratio 1 : 2 : 1
You need to login to perform this action.
You will be redirected in
3 sec
