Exciting Dihybrid Cross: Rose Bushes Phenotype Variations

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

Answer: 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):

The exciting dihybrid cross of two rose bushes has resulted in four possible phenotype variations among the offspring. The dominant alleles for red petals (R) and tall bushes (T) play a key role in determining the characteristics of the offspring. Here are the four potential phenotype variations:

  • 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

After analyzing the Punnett square, we can determine the number of offspring with each phenotype variation:

  • Total number of R_T_ = 9
  • Total number of R_tt = 3
  • Total number of rrT_ = 3
  • Total number of rrtt = 1

Hence, there are four (4) possible phenotype variations with their respective proportions as mentioned above. The genetic diversity among the offspring of these crossed rose bushes is truly remarkable!

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