Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?

The correct option is A

Co-dominance

The correct option is A.

Explanation of correct option:

1. When a cross happened between two parents and their First filial generation shows characteristics like both the parents equally, then the phenomenon is referred to as Co-dominance.
2. This happened due to both the alleles shows equal dominance.
3. No one allele hides the presence of another allele.
4. This leads to the First filial generation resembling both of their parents.
5. Examples, are Roan cattle.

Explanation of incorrect options:

Option B:

1. Mendel's law of dominance states that: “When parents with pure, contrasting traits are crossed together, only one form of trait appears in the next generation".
2. Both homozygous parents produce heterozygous progeny but the characteristic of only dominant progeny is expressed.

Option C:

1. When only one pair of alleles shows the inheritance of only one character, then the inheritance is referred to as the inheritance of one gene.
2. Here only one gene is involved.
3. Examples, Sickle cell anemia.

Option D:

1. The cross where both the parents are unable to express themselves in the Heterozygous condition, then the phenomenon is referred to as Incomplete dominance.
2. Here the contrasting pair of characters results in the expression of characteristics different from both the parents.
3. Examples, the 4' O clock plant.

Final answer: Co-dominance Is Depicted By A Cross In Which The F1 Generation Resembles Both The Parents