Answer to Question #317835 in Genetics for Nhlonipho Manganyi

Question

A herpetologist finds an anuran which has a green hue. This is the dominant colour trait and therefore the genotype for colour can be either homozygous (GG) or heterozygous (Gg). In this species of frog body colour that is brown suggests a recessive phenotype and therefore this genotype would have to be homozygous for the recessive allele (gg). G represents the dominant allele and g represents the recessive allele. Using selective breeding techniques, how would the researcher determine the genotype of the original green anuran? Explain how the results of this would help the researcher identify the genotype or the original green anuran.

Complete the following Punnet Squares and likely phenotype and genotype numbers representing the above cross scenarios, assuming that there were 100 offspring produced in the F1 generation of both crosses (i.e. for the genotypes and phenotypes, write the expected number/ratio). [4]

Answer 1

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