Biotechnology raises ethical questions primarily concerning

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answer 1 : therefore:   crossing results in 50% (dominant homozygote) and 50% (dominant heterozygote).

answer 2 : therefore:   crossing results in 25% (dominant homozygote), 50% (dominant heterozygote) and 25% (homozygous recessive).

answer 3 : therefore:   crossing results in 100% (homozygous recessive).