Examine the Punnett square below, which represents a dihybrid cross of two rose bushes. RT Rt rT rt RT RRTT RRTt RrTT RrTt Rt RRTt RRtt RrTt Rrtt rT RrTT RrTt rrTT rrTt rt RrTt Rrtt rrTt rrtt How many different phenotype variations are possible in the offspring of these crossed rose bushes? (R = red petals, r = pink petals, T = tall bush, t = short bush)

Four (4)

Explanation:

Assuming that the R (red petal) allele is dominant over the r (pink petal) allele and the T (tall bush) allele is dominant over the t (short bush) allele:

R_T_ = Red petal with tall bush

R_tt = Red petal with short bush

rrT_ = Pink petal with tall bush

rrtt = Pink petal with short bush

From the resulting offspring:

Total number of R_T_ = 9

Total number of R_tt = 3

Total number of rrT_ = 3

Total number of rrtt = 1

Hence, four (4) phenotype variations are possible with their respective proportion shown above.

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explanation: