In elephants, pink skin is due to the mutant allele g, which is recessive to the...

In elephants, pink skin is due to the mutant allele g, which is recessive to the wild-type allele G, which gives grey skin. The curly tail phenotype is due to the mutant allele t, which is recessive to the wild-type allele T, which gives a straight tail. The two genes are located close together on the same chromosome. An elephant that is heterozygous for both genes was crossed to a pink, curly tailed elephant, and the following progeny were observed:

Phenotype Number Genotype Parental or recombinant Grey, straight tailed elephants 39 Pink, straight tailed elephants 12 Grey, curly tailed elephants 9 Pink, curly tailed elephants 30

a) Fill out the table with the genotype for each class of offspring. Label each class as either parental or recombinant

b) Calculate the recombination frequency between the two genes.

c) The heterozygote used in the cross described above was produced by a mating of true-breeding elephants. What were the genotypes of the parents of the heterozygote?

d) Draw a diagram of the chromosome, showing the arrangement of the two genes in the heterozygote. Show both copies of the chromosom

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gladiator answered 2 years ago

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