In certain breeds of unicorns, the allele "Z" is responsible for rainbow wings whereas the contrasting...

In certain breeds of unicorns, the allele "Z" is responsible for rainbow wings whereas the contrasting “z” allele produces wings that have white. Unicorns heterozygous for this pair of alleles have glitter wings. Another pair of alleles influences the shape of the horn. “H” produces a straight horn whereas the contrasting gene form “h” results in a twisted condition. A unicorn heterozygous for this pair of alleles is mildly curled. Give the phenotypic and genotypic ratios to be expected from each of the following crosses:
1. A rainbow, twisted horned unicorn x a white straight horned unicorn
2. A white, twisted horned unicorn x a glitter, straight horn unicorn
3. A glitter, mildly curled horned unicorn x a white, twisted horn unicorn
4. A glitter, mildly curled horned unicorn x a glitter, mildly curled horn unicorn

Expert Solution

D. For dihybrid cross with heterozygous genotype,

First write dominant allele in homozygous form(HH), followed by 3 times heterozygous(HH)and 3 times homozygous recessive forms(hh), make combination of second trait genotypes (ZZ, Zz,ZZ) with (HH, Hh, HH) .

gladiator answered 2 years ago

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