Gauri Upadhye posted an Question
September 07, 2021 • 12:37 pm 30 points
  • IIT JAM
  • Biotechnology (BT)

10. if individuals of genotype aabbcc are intercrossed, how many different f2 phenotypes can appear assuming complete codominance at all loci? a. 8 b. 64 c. 27

10. If individuals of genotype AaBbCc are intercrossed, how many different F2 phenotypes can appear assuming complete codominance at all loci? a. 8 b. 64 C. 27 d. 9

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  • Abhijeet Gaurav best-answer

    Correct answer is option (C). Aa x Aa can produce three genotypes: AA, Aa and aa (Aa and aA are equivalent). The same with Bb x Bb and Cc x Cc. Since we presume they are independent, you have 3 x 3 x 3 = 27 combinations (AABBCC, AABBCc, AABBcc, AABbCC, AABbCc, AABbcc … aabbcc).

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