Question

A plant with red flowers is crossed with a white-flowered plant of the same species. All the seeds, when grown, produce plants with red flowers. Assuming that the flower colour is controlled by a single pair of alleles, which allele is dominant, and

Answer 1

Red - flower containing allele is dominant

Answer 2

One of a gene's potential forms is represented by an allele. The child receives one allele from the mother and another from the father, completing their genotype. For this reason, each gene has two alleles allocated to it.

Consider:

• Let's use the letter "R" to stand in for the allele that affects blossom colour.
• We can infer from the facts provided that white is the recessive trait and that red is the dominant characteristic.
• Therefore, the letter "R" will stand in for the colour red, and the letter "r" will stand in for the colour white.

• A plant of the same species that has white flowers and red flowers is hybridised.

All of the seeds grow into plants that have red flowers. We assume that the provided plant's blossom colour is determined by a single pair of alleles (a single gene), with the red-colored allele being dominant and the white-colored allele being recessive.

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