You crossed a petunia with red flowers to a petunia plant with white flowers. The seeds from this cross produced plants that all had red flowers. When the seeds obtained by selfing these plants were grown, the plants produced either red flowers or white flowers in the ration 3:1. Based on protein analysis, an enzyme called 'protein A' was isolated form the red flowers. This protein was not present in the white flowers.
Give the genotype with regards to flower color for the plants : parentals, F1 and F2s.
I said that the parentals are homozygous , the F1 generation are heterozygous and that the F2 generation has 2 heterozygotes, 1 homozygous recessive, and 1 homozygous dominant.
Is this correct?
Give the genotype with regards to flower color for the plants : parentals, F1 and F2s.
I said that the parentals are homozygous , the F1 generation are heterozygous and that the F2 generation has 2 heterozygotes, 1 homozygous recessive, and 1 homozygous dominant.
Is this correct?
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The parents are homozygous, you are correct. Assuming that A means Red, and a means White (use whatever letter you need/want), then the red flower petunia is AA and the white one is aa. All white ones have to be aa.
The F1 are all heterozygous. They can only be Aa, since one parent donates A only and the other can only donate a.
And, you are right with the F2 generation. If you know how to do a Punnett Square, you'd see it.
Yes, you are absolutely correct.
The F1 are all heterozygous. They can only be Aa, since one parent donates A only and the other can only donate a.
And, you are right with the F2 generation. If you know how to do a Punnett Square, you'd see it.
Yes, you are absolutely correct.