Mendel crossed purebred purple-flowered plants with purebred white-flowered plants, and all of the resultingoffspring produced purple flowers. The offspring are all ________, and the allele for purple flowers is __. A) heterozygotes... recessive B) heterozygotes... dominant C) homozygotes... recessive D) homozygotes... dominant
Biology · High School · Thu Feb 04 2021
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A) heterozygotes... dominant
In Mendelian genetics, when Gregor Mendel crossed purebred (homozygous) purple-flowered plants with purebred (homozygous) white-flowered plants, all of the resulting offspring produced purple flowers. This occurs because the allele for purple flowers is dominant over the allele for white flowers. The first generation of offspring, known as the F1 generation, are heterozygotes, meaning they have different alleles for the flower color gene—one for purple and one for white. However, because the purple allele is dominant, it masks the presence of the white allele, resulting in purple flowers for all the F1 plants.