What are the possible genotypes and phenotypes, along with their percentage chances, for the offspring of the following?

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The allele for axial flowers (A) in a pea plant is dominant over the allele for terminal flowers(a). A pea plant which is homozygous in the axial flower allele is crossed with a pea plant that is heterozygous.

Asked by luke, Last updated: Oct 29, 2024

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Anika Nicole, Wordsmith, PG In Journalism, New York

Answered May 15, 2018

Here, one parent is dominant with the homozygous alleles, hence the genotype of this dominant parent will be AA. Another parent has heterozygous alleles and hence, the genotype of recessive parent will be Aa.

Now, we after applying dominance theory of Gregor Mendel, the offsprings will carry the following genotype: AA, Aa, AA, and Aa. 50% offsprings will carry AA genotype and other 50% will have Aa genotype. All the offsprings will have axial flower phenotype.

John Smith

Answered Jan 04, 2017

One parent is homozygous dominant, so its genotype is AA. The other is heterozygous, so its genotype is Aa. The Punnett square looks like: A A a AA AA a Aa Aa Thus, 50% of the offspring have the AA genotype and 50% have the Aa genotype. Since each offspring has at least one of the dominant allele, however, 100% have the axial flower phenotype.