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Genetic Research Quick Check 4 of 54 of 5 Items Question In mice, the gene for tail length has two alleles. A long tail is dominant to a short tail. If a long-tailed mouse that is heterozygous mates with a short-tailed mouse, what are the chances of having offspring with short tails?(1 point) Responses 75% 75% 50% 50% 25% 25% 100% 100% Skip to navigation page 12 of 12
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GPT-4o mini
To solve this problem, we need to understand the inheritance of alleles for tail length in mice.
1. Let’s denote the alleles:
- **L** = long tail (dominant)
- **l** = short tail (recessive)
2. From the problem:
- The long-tailed mouse that is heterozygous would have the genotype **Ll**.
- The short-tailed mouse has the genotype **ll**.
3. Now, we can set up a Punnett square to determine the possible genotypes of the offspring:
```
L l
______________
l | Ll | ll |
|_________|______|
l | Ll | ll |
|_________|______|
```
4. From the Punnett square, the possible offspring genotypes are:
- **Ll** (long tail)
- **ll** (short tail)
5. The ratios of the genotypes are:
- 50% **Ll** (long-tailed)
- 50% **ll** (short-tailed)
6. Therefore, the chances of having offspring with short tails (genotype **ll**) is **50%**.
So, the answer is **50%**.
1. Let’s denote the alleles:
- **L** = long tail (dominant)
- **l** = short tail (recessive)
2. From the problem:
- The long-tailed mouse that is heterozygous would have the genotype **Ll**.
- The short-tailed mouse has the genotype **ll**.
3. Now, we can set up a Punnett square to determine the possible genotypes of the offspring:
```
L l
______________
l | Ll | ll |
|_________|______|
l | Ll | ll |
|_________|______|
```
4. From the Punnett square, the possible offspring genotypes are:
- **Ll** (long tail)
- **ll** (short tail)
5. The ratios of the genotypes are:
- 50% **Ll** (long-tailed)
- 50% **ll** (short-tailed)
6. Therefore, the chances of having offspring with short tails (genotype **ll**) is **50%**.
So, the answer is **50%**.