Select the incorrect statement.

Q: What is NEET?

NEET is a competitive examination conducted in India. This question is from the 2019 NEET Biology paper.

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This NEET 2019 Biology question has a easy difficulty level and is marked as an important question.

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Question

Select the incorrect statement.

Accepted Answer

Correct Answer: D — Inbreeding selects harmful recessive genes that reduce fertility and productivityStatement D is incorrect. Inbreeding does not select harmful recessive genes. Rather, by increasing homozygosity, inbreeding causes previously hidden harmful recessive alleles to be expressed in homozygous form, where they become visible to natural or artificial selection and can subsequently be eliminated from the population. The negative consequences (reduced fertility, reduced productivity, increased susceptibility to disease) that arise are collectively called inbreeding depression and are a result of the expression of these alleles, not their selection or accumulation.Why other options are correct:Option A is correct: Inbreeding allows breeders to identify and select superior genotypes, accumulating favorable genes and eliminating undesirable recessive traits over generations. Option B is correct: Inbreeding (mating between closely related individuals) increases the proportion of homozygous loci in successive generations, as measured by the inbreeding coefficient (F). Option C is correct: Inbreeding is the foundational method for developing pure lines (true-breeding strains) in livestock and plant breeding programs.Key Concept: Inbreeding depression = reduced biological fitness (fertility, productivity) in inbred populations due to expression of harmful recessive homozygotes. Inbreeding does NOT select harmful genes — it only exposes them through increased homozygosity.

Select the incorrect statement.

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Select the incorrect statement.

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