Pollen from a red – flowered plant A was used to pollinate white flowered plant B, the seeds from which produced 157 red-flowered plants. When...

      

Pollen from a red – flowered plant A was used to pollinate white flowered plant B, the seeds from which produced 157 red-flowered plants. When a red flowered plant C was pollinated by a white-flowered plant D, the resultant seeds gave rise to 84 red-flowered plants: and 91 white flowered plants. Assuming that plants A, B, C, and D were all of the same species and that flower colour in that species is controlled by a single pair of genes.
Using R for dominant gene and r for recessive gene, write down the genotypes of the following.
i)Plant A
ii)Plant B
iii)Progeny of A x B cross
iv)Plant C
v)Plant D
vi)Red flowered progeny of C x D cross.

  

Answers


Kavungya
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i)Plant A- homozygous Red- RR
ii)Plant B- homozygous white - rr
iii)Progeny of A x B cross- heterozogous Red- Rr
iv)Plant C- Heterozygous white - Red Rr
v)Plant D- homozygous white
vi)Progery of CXD cross - half heterozygous
Red Rr and half homozygous white rr
Kavungya answered the question on October 1, 2019 at 08:07


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