A recessive trait is expressed only when two copies of the gene are present.

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the YouScience Animal Science and Livestock Production Test with comprehensive quizzes. Study using flashcards and multiple-choice questions, each featuring helpful hints and detailed explanations. Get set for your test!

Multiple Choice

A recessive trait is expressed only when two copies of the gene are present.

Explanation:
A recessive trait shows up only when two copies of the recessive allele are present because the dominant allele masks the recessive one in any heterozygous combination. With one dominant and one recessive allele (a heterozygous pair), the dominant trait is expressed, so the recessive trait isn’t visible. Only when both alleles are recessive do you get the recessive phenotype (homozygous recessive). The other options don’t fit because a single dominant allele produces the dominant trait, environment doesn’t define whether a trait is recessive, and being heterozygous will not express the recessive trait.

A recessive trait shows up only when two copies of the recessive allele are present because the dominant allele masks the recessive one in any heterozygous combination. With one dominant and one recessive allele (a heterozygous pair), the dominant trait is expressed, so the recessive trait isn’t visible. Only when both alleles are recessive do you get the recessive phenotype (homozygous recessive). The other options don’t fit because a single dominant allele produces the dominant trait, environment doesn’t define whether a trait is recessive, and being heterozygous will not express the recessive trait.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy