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 paremts are true breeding?

Answer 1

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

If:
A - dominant allele for straight wings
a - recessive allele for curly wings

Then:
AA - straight-winged parent
aa - curly-winged parent

In their cross:
Parental generation:     AA     x      aa
F1 generation:           Aa    Aa    Aa     Aa

So, the offspring have one allele for straight wings and one allele for curly wings.

Answer 2

Answer:

For edge2020:

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

Explanation:

A) The offspring will have two genes for straight wings.

B) The offspring will produce only gametes that have genes for curly wings.

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

D) The offspring will have only one kind of allele for the gene that determines wing type.

The reasoning in the answer above is correct.