If round seed (RR) was dominant over wrinkled seed (rr) in a monohybrid cross, and yellow pod (YY) was dominant over brown pod (yy), what should be the starting genotype of parents in a dihybrid cross?(a) RRrr and YYyy(b) RRYY and rryy(c) RRyy and YYrr(d) RrYy and RrYyThe question was posed to me during a job interview.The above asked question is from Inheritance of Two Genes-1 in chapter Principles of Inheritance and Variation of Biology – Class 12

If round seed (RR) was dominant over wrinkled seed (rr) in a monohybri

1.	If round seed (RR) was dominant over wrinkled seed (rr) in a monohybrid cross, and yellow pod (YY) was dominant over brown pod (yy), what should be the starting genotype of parents in a dihybrid cross?(a) RRrr and YYyy(b) RRYY and rryy(c) RRyy and YYrr(d) RrYy and RrYyThe question was posed to me during a job interview.The above asked question is from Inheritance of Two Genes-1 in chapter Principles of Inheritance and Variation of Biology – Class 12
Answer» Right answer is (b) RRYY and rryy The explanation: The DIHYBRID cross is used to the inheritance pattern of two contrasting CHARACTERS. HENCE, they should be true-breeding. One for both dominant traits and the other for both recessive traits.

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