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------------------------------------------------ In modern terminology, a true-breeding strain is ________.

1) heterozygous
2) hybrid
3) homozygous
4) dominant

Answer :

Final answer:

A true-breeding strain is homozygous, hence the correct option is 3) homozygous.

Explanation:

This term refers to a genetic line in which individuals are inbred and possess the same alleles for a specific trait.

True-breeding individuals always produce offspring with the same phenotype when self-fertilized because they carry the same genetic information for the trait in question.

Consequently, when two true-breeding individuals are crossed, all of their offspring will also be homozygous for the trait.

Therefore, the correct option is 3) homozygous.

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