Please list all possible genotypes for the following: 1. Sepia, Brown? 2. Red, B
ID: 135372 • Letter: P
Question
Please list all possible genotypes for the following:
1. Sepia, Brown?
2. Red, Brown?
3. Sepia, Ebony?
Recall that "e" (ebony) and "s" (sepia) indicate recessive alleles; dominant alleles are"E" (brown) and "S" (red) The fly pictures below are labeled for eye color and body color LIST ALL THE POSSIBLE GENOTYPES OF EACH FLY BELOW EACH PICTURE. Why do we say possible? Remember that the red and brown alleles are dominant-this means that the same phenotype might be produced by more than one genotype. Note that red eyes are clearly red in color, whereas sepia eyes may have a reddish tint, but are not bright red. The first set has been done as an example,Explanation / Answer
Q5.B: Recessive allele is "s" (Sepia) and the dominant allele is "E" (Brown). Therefore, two types of genotype are possible for Sepia, Brown and these genotypes are ssEE, ssEe. For the phenotype Sepia, the genotype must be homozygous recessive(ss) and for the phenotype Brown, the genotype may be homozygous dominant(EE) or Heterozygous(Ee) So, the correct answer is ssEE, ssEe.
Q5.C: Dominant alleles are "E" (Brown) and "S" (Red). For the phenotype Red, the genotype may be homozygous dominant(SS) or heterozygous(Ss) as well as for the phenotype Brown, the genotype may be homozygous dominant(EE) or heterozygous(Ee). So, there are four possible genotypes for Red, Brown and these are SSEE, SSEe, SsEe, SsEE.
Q5.D: Recessive alleles are "e" (Ebony) and "s" (Sepia). For the phenotype Sepia, the genotype must be homozygous recessive(ss) and for the phenotype Ebony, the genotype must be homozygous recessive(ee). So the only possible genotype for Sepia, Ebony is ssee.