Question

a scientist is studying fruit fly wings. straight wings are dominant, and curly wings are recessive. which statement correctly describes the f1 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 offspring will have only one kind of allele for the gene that determines wing type.

Explanation:

Let the allele for straight - wings be represented by 'S' (dominant) and the allele for curly - wings be represented by's' (recessive). A true - breeding straight - winged parent has a genotype of SS and a true - breeding curly - winged parent has a genotype of ss. When they are crossed (SS x ss), all of the F1 generation offspring will have the genotype Ss. This means each offspring will have one allele for straight wings (S) and one allele for curly wings (s).

Answer:

The offspring will have one allele for straight wings and one allele for curly wings.