Question

According to Mendel's law of dominance which genotypes represent offspring with red flowers on the chart
RR
Rr
RR or Rr
rr or Rr

Then according to his law of dominance we expect ____ percent of of offspring to have white flowers
0%
10%
25%
50%

Answer 1

According to Mendel's law of dominance, the dominant allele (R in this case for red flowers) will mask the expression of the recessive allele (r for white flowers).

In the given genotypes:
- **RR** consists of two dominant alleles, leading to red flowers.
- **Rr** consists of one dominant and one recessive allele, also resulting in red flowers.
- **rr** consists of two recessive alleles, resulting in white flowers.

Thus, the genotypes that represent offspring with red flowers are **RR or Rr**.

Regarding the expectation of offspring with white flowers:
- The only genotype that produces white flowers is **rr**.
- If we cross parents with genotypes like **RR x rr** or **Rr x Rr**, we can evaluate the expected percentages.

For example:
- In a cross of **Rr x Rr**:
- The expected genotype ratio is 1 RR : 2 Rr : 1 rr.
- Therefore, 1 out of 4, or **25%**, would have white flowers (rr).

So the expected percentage of offspring to have white flowers, according to Mendel's law of dominance, would be **25%**.