Question

Some plants fail to produce chlorophyll, and this trait appears to be recessive. many plants also self-pollinate. if we locate a pea plant that is heterozygous for this trait, self-pollinate it and harvest seeds, what are the likely phenotypes of these seeds when they germinate?

Answer 1

If we denote the recessive allele of the gene as p and the dominant allele as P, the offspring will be of phenotypic ratio 3:1 those with chlorophyll to those without chlorophyll respectively. Genotypically, 25% would be homozygous for dominant allele, 50% heterozygous and 25% homozygous recessive. See attached punnet square