A self-pollinating plant with orange flowers and alternating leaf arrangement produces
Plants with red flowers and alternating leave- 47
Pants with orange flowers and alternating leaves- 103
Plants with yellow flowers and alternating leaves- 51
The genotype of the original parent plant is

Heterozygous for both flower colour and leaf arrangement

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Homozygous for both flower colour and leaf arrangement

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Homozygous for flower colour and heterozygous for leaf arrangement

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Heterozygous for flower colour and homozygous for leaf arrangement

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Heterozygous for flower colour but unable to determine genotype for leaf arrangement

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Solution

The correct option is E Heterozygous for flower colour and homozygous for leaf arrangement
Since the $F_{2}$ generation of the monohybrid cross is showing the phenotypic ratio of 1:2:1, it is an example of incomplete dominance. Yellow flower (Y) allele is incompletely dominant over that of red flower (y) and the heterozygous dominant genotype (Yy) exhibit orange phenotype. The yellow phenotype is exhibited only by homozygous dominant genotype "YY" while homozygous recessive "yy" exhibits red flower. The parent plant is homozygous for leaf arrangement gene as there is no segregation of two different phenotypes in offspring. Self-pollination of the plant with orange flowers and alternating leaves give 1 homozygous dominant: 2 heterozygous dominant: 1 homozygous recessive offspring which means the parent is heterozygous for an incompletely dominant trait (yellow flower) and homozygous for leaf arrangement.
Therefore, the correct answer is option D.

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Similar questions

Q. A self-pollinating plant with orange flowers and alternating leaf arrangement produces
Plants with red flowers and alternating leave- 47
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Q. Choose the correct answer from the alternatives given.

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A self-pollinating plant with orange flowers and alternating leaf arrangement producesPlants with red flowers and alternating leave- 47Pants with orange flowers and alternating leaves- 103Plants with yellow flowers and alternating leaves- 51The genotype of the original parent plant is

A self-pollinating plant with orange flowers and alternating leaf arrangement produces
Plants with red flowers and alternating leave- 47
Pants with orange flowers and alternating leaves- 103
Plants with yellow flowers and alternating leaves- 51
The genotype of the original parent plant is