Question

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two rough - coated (curly hair) guinea pigs produce an offspring with a smooth coat.
select the statement(s) that accurately predict the outcome for the cross between these two parents.
□ rough coat is dominant to smooth coat.
□ a genetic mutation caused the offspring to have a smooth coat.
□ the smooth coat offspring inherit the gene from both parents.
□ smooth coat is dominant to rough coat.
□ both parents carry the smooth coat trait in their genes.

Explanation:

• Rough coat is dominant because two rough-coated parents can produce a smooth-coated offspring only if smooth is recessive (parents are heterozygous).
• A recessive trait (smooth coat) requires two copies of the recessive allele, so the offspring must inherit it from both parents.
• For parents to pass the recessive allele to offspring, both must carry the smooth coat trait (heterozygous: Rr). Mutation is not needed as this follows Mendelian inheritance. Smooth coat cannot be dominant (dominant parents would not produce recessive offspring).

Answer:

Rough coat is dominant to smooth coat., The smooth coat offspring inherit the gene from both parents., Both parents carry the smooth coat trait in their genes.