If all the F₁ generation of a crossing is heterozygous, what information can be deduced from the parental genotypes?

University of Ilorin BIO101 2026-exam past question

1. One homozygous dominant and one homozygous recessive
2. Both heterozygous dominant
3. Both homozygous recessive
4. One heterozygous and one homozygous

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