(i) Give the genotype of the following. |
(a) Parents |
(b) The individual X in second generation |
(ii) State the possible blood groups of the individual Y in third generation. |
(iii) How does the inheritance of this blood group explain codominance? |
Answer:
(i) (a) Parents genotype \[\begin{matrix} {{I}^{A}}i & and & {{I}^{B}}i \\ \downarrow & {} & \downarrow \\ A & {} & B \\ \end{matrix}\] (b) 'X' individual in second generation will be \[{{I}^{A}}{{I}^{B}}\,\,\text{or}\,\,{{I}^{B}}i\,\,\text{or}\,\,{{I}^{A}}i\,\,\text{or}\,\,ii.\] (ii) Possible blood groups of individual T will be group A or O. (iii) \[{{I}^{A}}\] and \[{{I}^{B}}\] when stay together, show the phenomenon of codominance and express themselves in the presence of each other. In heterozygous condition, when both alternative alleles coexist, they show codominance.
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