In Drosophila, normal wings are the dominant trait, curved wings are recessive. What will be the offspring

In Drosophila, normal wings are the dominant trait, curved wings are recessive. What will be the offspring from the analyzing crossing: 1. a homozygous individual with normal wings; 2. a heterozygous individual with normal wings; 3. individuals with curved wings?

Let us designate the gene that determines the normal wings of a Drosophila as P, then the gene for the folded wings of a fly will be p.

Analyzing is called this type of crossing, when the analyzed individual is crossed with a homozygote for a recessive gene. In this case, it will be a fly with curved wings – pp.

1. A homozygous fruit fly with normal wings will be recorded as PP, it will produce P. germ cells.

When crossed with a fly with bent wings and a pp genotype that produces p germ cells, the resulting offspring will have normal wings and a heterozygous pp genotype.

2. Heterozygous fruit fly with normal wings – Pp. It produces sex cells P and p. The offspring looks like: 50% – Pp: flies with normal wings; 50% – pp: flies with curved wings.

3. An individual with bent wings will be pp, the sex cells produced by it will be p. When crossed with the same individual, all offspring will be homozygous for the folded wings gene – pp and have the corresponding phenotype.