Question
According to Mendel’s law of dominance, we would expect _________ percent of the offspring to have white flowers.
Responses
A 0
B 25
C 50
D 75
Responses
A 0
B 25
C 50
D 75
Answers
GPT-4o mini
Mendel's law of dominance states that in a heterozygous genotype (having two different alleles), the dominant allele will mask the effect of the recessive allele. If we consider a typical monohybrid cross between a homozygous dominant plant with purple flowers (PP) and a homozygous recessive plant with white flowers (pp), all of the offspring (F1 generation) would be heterozygous (Pp) and exhibit the dominant trait (purple flowers).
When these F1 plants are self-crossed (Pp x Pp) in the F2 generation, we would expect the following genotype ratio:
- 25% homozygous dominant (PP)
- 50% heterozygous (Pp)
- 25% homozygous recessive (pp)
Since only the homozygous recessive genotype (pp) would express the white flowers, we would expect **25%** of the offspring to have white flowers.
So, the answer is:
**B 25**
When these F1 plants are self-crossed (Pp x Pp) in the F2 generation, we would expect the following genotype ratio:
- 25% homozygous dominant (PP)
- 50% heterozygous (Pp)
- 25% homozygous recessive (pp)
Since only the homozygous recessive genotype (pp) would express the white flowers, we would expect **25%** of the offspring to have white flowers.
So, the answer is:
**B 25**