Answer :
To find out what percent of the offspring are expected to have a green body color, we can perform a Punnett square analysis.
We have two dragons:
1. A dragon with genotype Bb, meaning it has one allele for blue body color (B) and one allele for green body color (b). This is a heterozygous genotype.
2. A dragon with genotype bb, meaning it has two alleles for green body color. This is a homozygous recessive genotype.
Let's create a Punnett square to determine the possible genotypes of their offspring.
In a Punnett square, we put the alleles from one parent on the top and the alleles from the other parent on the side. Let's do this step by step:
Parent 1 (Bb): We'll place B and b on the top of the Punnett square.
Parent 2 (bb): We'll place b and b on the side of the Punnett square.
The Punnett square will look as follows:
```
B b
b Bb bb
b Bb bb
```
From this square, we can see there are four possible combinations when these two dragons breed:
1. Bb - which occurs when the first b from the second dragon (on the side) combines with B from the first dragon.
2. bb - which occurs when the first b from the second dragon (on the side) combines with b from the first dragon.
3. Bb - which occurs when the second b from the second dragon (on the side) combines with B from the first dragon.
4. bb - which occurs when the second b from the second dragon (on the side) combines with b from the first dragon.
Now, we tally up the results:
- There are 2 Bb offspring. These dragons will have a blue body color because they have at least one dominant allele (B).
- There are 2 bb offspring. These dragons will have a green body color because they have two recessive alleles (bb) and no dominant allele to mask these.
Since we are looking for the offspring with green body color (bb), there are 2 out of 4, which is equal to 50%.
Therefore, the answer is C. 50% of the offspring are expected to have green body color.
