The Law of Dominance states that in a cross involving two different alleles for a trait, the dominant allele can mask the effect of the recessive allele. If we assume that large teeth are represented by a dominant allele (let's say "L") and small teeth are represented by a recessive allele (let's say "l"), then the expected offspring percentages depend on the parental genotypes.
If we consider a typical cross between heterozygous parents (Ll x Ll), the potential genotypes would be:
- LL (homozygous dominant)
- Ll (heterozygous)
- ll (homozygous recessive)
From this cross, the expected offspring genotypic ratio would be 1 LL : 2 Ll : 1 ll, translating to a phenotypic ratio of 3 large teeth (LL and Ll) to 1 small teeth (ll).
That means 75% of the offspring would exhibit the dominant trait of large teeth.
Based on this reasoning, the correct response is: C 75
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