Please solve all thanks In Drosophila lines are crossed. one carrying the aptero
ID: 132103 • Letter: P
Question
Please solve all thanks In Drosophila lines are crossed. one carrying the apterous (ap) mutation, second line carries the sepia (s) mutation. apiaries (ap) makes wings short (Wild type is long) and the sepia (s) mutation makes body day gray (wild type is light gray). Both mutations are recessive and they are located on different chromosomes, apterous is on the 2nd chromosome and sepia is on the 3rd chromosome. Write out the P1 cross. Set up the F1 and F2 crosses. showing genotypes and phenotypes of the offspring (10 points)
Explanation / Answer
Parents: drosophila wild type for length and color of wing is crossed with drosophila which has short wing and day gray color
(AP/AP, SS) x (ap/ap, as)
F1 are all with long wings and light gray color with the genotype (AP/ap, Ss).
F2: (AP/ap, Ss)
The phenotypic ratio in F2 is 9:3:3:1
The genotypic ration in F2 is 1:2:1:2:4:2:1:2:1
AP S AP s ap S ap s AP S APAP SS APAP Ss APap SS APap Ss AP s APAP Ss APAP ss APap Ss APap ss ap S APap Ss APap Ss apap SS apap Ss ap s APap Ss APap ss apap Ss apap ss