If a dihybrid F1 plant is self fertilized, what proportion of progeny will have the same phenotype as the F1 parent? What proportion will be true-breeding? What proportion will be heterozygous at one or both loci?

Question

Biology

Ana Liu

4 March, 05:58

If a dihybrid F1 plant is self fertilized, what proportion of progeny will have the same phenotype as the F1 parent? What proportion will be true-breeding? What proportion will be heterozygous at one or both loci?

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Kieran Nolan · Answer 1

If a dihybrid F1 plant, self-fertilizes, the F2 progeny will have two types of phenotypes. One would be the dominant trait phenotype for both the alleles, which would be possessed by 3/4th of the population.

Other would be recessive trait phenotype for both the alleles, which would be possessed by 1/4th of the population.

One fourth of the population would be true-breeding for the dominant traits.

Half of the population would be heterozygous for both traits and would have dominant phenotype

Rest one-fourth population would be homozygous for both recessive traits