Your are porivded with two pure-breeding varieties of the same crop plant; one is resistant to weed-killer and the other is non-resistant.
Explain how you would carry out a genetic experiment to determine whether the resistance is dominant or recessive.
2006-09-17 21:35:21 · 2 answers · asked by pm 1 in Science & Mathematics ➔ Biology
Cross breed the resistant plant with the non resistance plant. You would then get heterozygous plants. Crossbreed these heterozygous plants. Spray the offspring with weed killer and if you get 1/4 of the plants still living, then the resistance gene is resessive. If you get 3/4 of the plants still living then the resistance gene is dominant.
2006-09-17 21:47:15 · answer #1 · answered by mrmao123 2 · 1⤊ 0⤋
Breed them with each other.
In the first generation, all plants will inherit one resistant gene and one non-resistant gene. Spray them with the weed-killer, and see how well they resist. If the plants are resistant, the gene is dominant. If they're not restant, then the gene is recessive.
That wasn't so hard, was it? :-)
2006-09-18 04:47:34 · answer #2 · answered by Bramblyspam 7 · 1⤊ 0⤋