A scientist is studying fruit fly wings. Straight wings are dominant, and curly wings are recessive. Which statement
correctly describes the generation if a straight-winged parent is crossed with a curly-winged parent and if both
parents are true breeding?
The offspring will have two genes for straight wings.
The offspring will produce only gametes that have genes for curly wings.
The offspring will have one allele for straight wings and one allele for curly wings.
The offispring will have only one kind of allele for the gene that determines wing type.

Question

A scientist is studying fruit fly wings. Straight wings are dominant, and curly wings are recessive. Which statement
correctly describes the

generation if a straight-winged parent is crossed with a curly-winged parent and if both
parents are true breeding?
The offspring will have two genes for straight wings.
The offspring will produce only gametes that have genes for curly wings.
The offspring will have one allele for straight wings and one allele for curly wings.
The offispring will have only one kind of allele for the gene that determines wing type.

UpStudy AI · Accepted Answer

1. Denote the dominant allele for straight wings as $$ S $$ and the recessive allele for curly wings as $$ s $$.

2. The straight-winged true breeding parent has the genotype $$ SS $$.

3. The curly-winged true breeding parent has the genotype $$ ss $$.

4. Crossing $$ SS $$ with $$ ss $$ produces offspring with the genotype $$ Ss $$.

5. Therefore, each offspring has one allele for straight wings ($$ S $$) and one allele for curly wings ($$ s $$).
Each offspring has one allele for straight wings and one allele for curly wings.

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