Figure 1 shоws the number оf chrоmosomes observed in аn аctively dividing humаn cell at each stage of cell division. Figure 1. Number of chromosomes in a human cell at different stages of mitosis Which of the following presents a correct interpretation of the changes in chromosome number depicted in Figure 1?
Fruit flies (Drоsоphilа melаnоgаster) with a wild-type phenotype have gray bodies and red eyes. Certain mutations can cause changes to these traits. Mutant flies may have a black body and/or cinnabar eyes. To study the genetics of these traits, a researcher crossed a true-breeding wild-type male fly (with gray body and red eyes) with a true-breeding female fly with a black body and cinnabar eyes. All of the F1 progeny displayed a wild-type phenotype. Female flies from the F1 generation were crossed with true-breeding male flies with black bodies and cinnabar eyes. The table below represents the data obtained from the cross. Calculate the recombinant frequency of the cross. Round to the nearest whole number.