Question

Based on the Law of Dominance, we would expect _____ percent of the offspring from this cross to have large teeth.
Responses
A 00
B 2525
C 7575
D 100

Answer 1

The Law of Dominance states that in a cross between two organisms, the dominant allele will 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 by a recessive allele (let's say "l"), then the expected percentages of offspring will depend on the genotypes of the parents involved in the cross.

For instance:
- If both parents are homozygous dominant (LL), then 100% of the offspring will have large teeth.
- If one parent is homozygous dominant (LL) and the other is homozygous recessive (ll), then 100% of the offspring will also have large teeth (Ll).
- If both parents are heterozygous (Ll), then according to a Punnett square, we would expect 75% of the offspring to have large teeth (genotypes LL and Ll).

Without knowing the specific genotypes of the parents involved in the cross, we can deduce the potential outcomes:

1. If both parents show the dominant trait, then **D (100%)** would be correct.
2. If one parent is homozygous recessive, than **D (100%)** would still be correct.
3. If both parents are heterozygous, **C (75%)** would be correct.

Based on the context provided and a common understanding of these genetic principles, I would say the answer could potentially be **75%**, but since no specific genotypes were given in the problem, it leans towards **100%** especially if one parent carries a dominant trait.

In conclusion, select **D (100%)** for maximal certainty, unless you are aware of differing parent genotypes.