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Determine the F1 genotype and phenotype, given parental blood group and genotype, and considering possible gametes.

Biology

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let's complete this genetics problem. The image shows two possible crosses for human blood groups. I will present the F1 genotypes and phenotypes for both scenarios.

Scenario 1: Cross between homozygous Blood Group A and heterozygous Blood Group B

  1. Identify parental genotypes and gametes.

    • Parent 1 (Blood Group A): IAIAI^A I^A
    • Parent 2 (Blood Group B): IBIOI^B I^O
    • Gametes from Parent 1: IAI^A
    • Gametes from Parent 2: IBI^B, IOI^O
  2. Construct the Punnett square.

    GametesIAIBIAIBIOIAIO\begin{array}{|c|c|} \hline \text{Gametes} & I^A \\ \hline I^B & I^A I^B \\ \hline I^O & I^A I^O \\ \hline \end{array}
  3. Determine the F1 genotypes and phenotypes.

    • F1 Genotypes:
      • IAIBI^A I^B
      • IAIOI^A I^O
    • F1 Genotypic Ratio: 1IAIB:1IAIO1 I^A I^B : 1 I^A I^O
    • F1 Phenotypes:
      • Blood Group AB
      • Blood Group A
    • F1 Phenotypic Ratio: 1 Blood Group AB : 1 Blood Group A\boxed{\text{1 Blood Group AB : 1 Blood Group A}} or 12 Blood Group AB, 12 Blood Group A\boxed{\frac{1}{2} \text{ Blood Group AB, } \frac{1}{2} \text{ Blood Group A}}

    Scenario 2: Cross between heterozygous Blood Group A and heterozygous Blood Group B

  4. Identify parental genotypes and gametes.

    • Parent 1 (Blood Group A): IAIOI^A I^O
    • Parent 2 (Blood Group B): IBIOI^B I^O
    • Gametes from Parent 1: IAI^A, IOI^O
    • Gametes from Parent 2: IBI^B, IOI^O
  5. Construct the Punnett square.

    GametesIAIOIBIAIBIBIOIOIAIOIOIO\begin{array}{|c|c|c|} \hline \text{Gametes} & I^A & I^O \\ \hline I^B & I^A I^B & I^B I^O \\ \hline I^O & I^A I^O & I^O I^O \\ \hline \end{array}
  6. Determine the F1 genotypes and phenotypes.

    • F1 Genotypes:
      • IAIBI^A I^B
      • IBIOI^B I^O
      • IAIOI^A I^O
      • IOIOI^O I^O
    • F1 Genotypic Ratio: 1IAIB:1IBIO:1IAIO:1IOIO1 I^A I^B : 1 I^B I^O : 1 I^A I^O : 1 I^O I^O
    • F1 Phenotypes:
      • Blood Group AB
      • Blood Group B
      • Blood Group A
      • Blood Group O
    • F1 Phenotypic Ratio: 1 Blood Group AB : 1 Blood Group B : 1 Blood Group A : 1 Blood Group O\boxed{\text{1 Blood Group AB : 1 Blood Group B : 1 Blood Group A : 1 Blood Group O}} or 14 AB, 14 B, 14 A, 14 O\boxed{\frac{1}{4} \text{ AB, } \frac{1}{4} \text{ B, } \frac{1}{4} \text{ A, } \frac{1}{4} \text{ O}}
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