F₁ generation resembles both the parents in

Question

Question

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AMRU HP BSc Nursing Admission Test 7 July 2024 Official Paper

Answer 1

Correct Answer: Co-Dominance

Rationale:

Co-dominance is a form of genetic inheritance where both alleles contribute equally and visibly to the phenotype of the organism. In the F1 generation, this results in offspring that display traits from both parents equally.
For example, in the case of blood types, if one parent has type A blood and the other has type B blood, their offspring may have type AB blood, exhibiting characteristics of both A and B alleles.

Explanation of Other Options:

Incomplete Dominance

Rationale: Incomplete dominance occurs when the phenotype of the F1 generation is a blend of the parental traits, rather than a display of both. This means the offspring will show an intermediate phenotype, not clearly resembling either parent fully.

Pleiotropy

Rationale: Pleiotropy refers to a single gene influencing multiple, seemingly unrelated phenotypic traits. It does not specifically relate to the resemblance of the F1 generation to the parents in terms of individual traits.

Law of Dominance

Rationale: The Law of Dominance, proposed by Gregor Mendel, states that in a heterozygote, one trait will conceal the presence of another trait for the same characteristic. The dominant allele masks the recessive one, meaning the F1 generation will resemble the dominant parent more, not both parents equally.

Conclusion:

Among the given options, co-dominance is the correct answer because it directly describes a situation where the F1 generation shows traits from both parents equally, which is not the case with incomplete dominance, pleiotropy, or the law of dominance.