
a.
To determine:
The genotype of back cross progeny from a homozygous brown fish with a homozygous white fish, and backcrossed the F1 with the homozygous white parent.
Introduction:
Medaka is a small fish, which is found in Japan. The fish are of four colors; red, blue, brown, and white. The color of the fish is determined by the genes at two loci; B, b, and R, r. Brown color is determined by two dominant loci (B_R_), blue color of the fish is determined by one dominant allele (B_rr), red color of the fish is determined by only one dominant allele at the R locus (bbR_), and white color is determined by a recessive allele at both locus (bb rr).
b.
To compare:
The observed numbers of back cross progeny with the number expected progeny, by using a chi-square test, also to conclude the result of chi-square test.
Introduction:
Medaka is a small fish, which is found in Japan. The fish are of four colors; red, blue, brown and white. The color of fish is determined by the genes at two loci; B, b and R, r.
Brown color is determined by two dominant loci (B_R_), blue color of the fish is determined by one dominant allele (B_rr), red color of the fish is determined by only one dominant allele at R locus (bbR), and white color is determined by recessive allele at both locus (bb rr).
c.
To determine:
The result which is expected in a cross between homozygous red and homozygous white fish.
Introduction:
Medaka is a small fish which is found in Japan. The fish are of for colors; red, blue, brown and white. The color of fish is determined by the genes at two loci; B, b and R, r.
Brown color is determined by two dominant loci (B_R_), blue color of the fish is determined by one dominant allele (B_rr), red color of the fish is determined by only one dominant allele at R locus (bbR_) , and white color is determined by recessive allele at both locus (bb rr).
d.
To determine:
The expected result from a cross between homozygous redfish and homozygous blue fish and the
Introduction:
Medaka is a small fish which is found in Japan. The fish are of for colors; red, blue, brown and white. The color of fish is determined by the genes at two loci; B, b and R, r.
Brown color is determined by two dominant loci (B_R_), blue color of the fish is determined by one dominant allele (B_rr), red color of the fish is determined by only one dominant allele at R locus (bbR_) , and white color is determined by recessive allele at both locus (bb rr).

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Chapter 5 Solutions
Genetics
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