Two genes (R or r) and (D or d), each with a dominant and recessive allele, are
inherited independently of each other. Which of the following combinations
could result in gametes of a plant with an Rr Dd genotype?
A. RD and rd
B. DR, Dr, Rd, dr
C. DD, Dd, dd, RR, Rr, rr
D. Rrand Dd

This question involves two genes. Alleles D and R are dominant over alleles d and r. These two genes obey the law of independent assortment as proposed by Gregor Mendel.

Based on the question, a genotype RrDd will produce the following combination of gametes following the process of meiosis:

DR, Dr, dR, dr

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Two genes (R or r) and (D or d), each with a dominant and recessive allele, are inherited independently of each other. Which of the following combinations could result in gametes of a plant with an Rr Dd genotype? A. RD and rd B. DR, Dr, Rd, dr C. DD, Dd, dd, RR, Rr, rr D. Rrand Dd

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Two genes (R or r) and (D or d), each with a dominant and recessive allele, are
inherited independently of each other. Which of the following combinations
could result in gametes of a plant with an Rr Dd genotype?
A. RD and rd
B. DR, Dr, Rd, dr
C. DD, Dd, dd, RR, Rr, rr
D. Rrand Dd