4) a) The presence of millipede phenotype is dominant and wild type is recessive.
b) Test cross is done to determine the genotype of unknown offspring. The tester strain will be homozygous recessive. If the genotype of unknown offspring is homozygous, all the offsprings will be having millipede phenotype. If the genotype of unknown organism is heterozygous, half if the offsprings will be having millipede phenotype and the other half will be having wild phenotype.
c) If the millipede gene is on X chromosome, there will be sex specific differentiation in the distribution of phenotypes. On the other hand, if the millipede gene is on autosome, there will be no sex specific differentiation in the distribution of phenotypes.
Genetics question! 4. You are starting a research program in a Drosophila lab, A previous students...
You begin working in a genetics lab that uses Drosophila and find that a previous student has left behind a bottle of flies that have a yellow (instead of brown) body with no information about the mutation that leads to the yellow body color. You first determine that these flies are true breeding, and then set up some crosses. Cross 1: You cross yellow females with true breeding wild type males. In the F1s, all of the females have brown...
In Genetics lab, you decide to further investigate Drosophila eye color. In addition to studying the sepia gene (se), you decide to study the gene mahogany eyes (mo). Flies that are mo-/mo- have brown eyes. You wonder if a fly that is a double mutant for sepia and mahogany eyes would have very dark brown (almost black) eyes. Because se and mo are both on the third chromosome, you have to do a recombination. You look through a former labmate’s...