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There are two plants: one pure bred colored flowered plant and one pure bred col

ID: 5851 • Letter: T

Question

There are two plants: one pure bred colored flowered plant and one pure bred colorless flowered plant. The First generation (F1) turned out all colored plants and then were self pollinated and produced a second generation (F2) of 196 colored plants and 92 colorless plants. Two potential hypothesis for this could be

1) This is a monohybrid cross where the colored flowers dominate the colorless
or
2)This is a dihybrid cross where flower color is dependent on two dominant complementary genes that are on different chromosomes, example: only A_B_ genotypes produce colored flowers

which one is it and why or lead me in the right direction please

Explanation / Answer

This follows a typical monohybrid cross, one trait being studied with the F2 outcome being a 3:1 ratio. AA(colored) and aa(colorless or white). First cross F1 yields all dominant heterozygous Aa. Second cross F2 yields 1/4 AA, 1/2Aa, and 1/4 aa. This follows your first hypothesis. The second hypothesis would yield a different ratio.

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