If a homozygous dominant parent (AA) mates with a homozygous recessive parent (aa), what percentage of their F1 offspring will express the dominant phenotype?

A 0%

B 25%

C 50%

D 100%

✓ Correct Answer: Option D

All F1 offspring will be heterozygous (Aa) and express the dominant phenotype because they inherit at least one dominant allele from the homozygous dominant parent. The dominant allele will mask the recessive allele.

💡 Why is D) the correct answer?

The correct answer to the question "If a homozygous dominant parent (AA) mates with a homozygous recessive parent (aa), what percentage of their F1 offspring will express the dominant phenotype?" is Option D: 100%.

The other options — A) 0%, B) 25%, C) 50% — are incorrect for this GED Exam Prep question. As explained above: All F1 offspring will be heterozygous (Aa) and express the dominant phenotype because they inherit at least one dominant allele from the homozygous dominant parent. The dominant allele will mask the …

📚 About This GED Exam Prep Practice Question

This 2-level GED Exam Prep question from the Science topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free GED Exam Prep practice test or use flashcards for spaced repetition review.

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If a homozygous dominant parent (AA) mates with a homozygous recessive parent (aa), what percentage of their F1 offspring will express the dominant phenotype?

✓ Correct Answer: Option D

📚 About This GED Exam Prep Practice Question

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