From 2 to to 6 percent of people with autism have an extra chromosome that consists of to long arms of chromosome 15. it inlcuds two copies of the chromosome 15 centromere. two normal copies of the chromosome are also present. what type of chomosome abnormality in a gamete can lead to this karyotype is called isodicentric 15?

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?